Commit hourCycle test.

For some reason this is non-functional...

CLOBBER

@@ -22,4 +22,4 @@
 # changes to stick? As of bug 928195, this shouldn't be necessary! Please
 # don't change CLOBBER for WebIDL changes any more.
 
-Clobber for NSS update
+Touching ICU's build system requires a CLOBBER. (Issue #2165)

Makefile.in

@@ -137,16 +137,10 @@ default:: $(BUILD_BACKEND_FILES)
 endif
 
 install_manifests := \
-  $(addprefix dist/,branding idl include public private sdk xpi-stage) \
+  $(addprefix dist/,branding bin idl include public private sdk xpi-stage) \
   _tests \
   $(NULL)
-# Skip the dist/bin install manifest when using the hybrid
-# FasterMake/RecursiveMake backend. This is a hack until bug 1241744 moves
-# xpidl handling to FasterMake in that case, mechanically making the dist/bin
-# install manifest non-existent (non-existent manifests being skipped)
-ifeq (,$(filter FasterMake+RecursiveMake,$(BUILD_BACKENDS)))
-install_manifests += dist/bin
-endif
+
 install_manifest_depends = \
   CLOBBER \
   $(configure_dir)/configure \
@@ -166,45 +160,9 @@ endif
 .PHONY: install-manifests
 install-manifests: $(addprefix install-,$(install_manifests))
 
-# If we're using the hybrid FasterMake/RecursiveMake backend, we want
-# to recurse in the faster/ directory in parallel of install manifests.
-# But dist/idl needs to happen before (cf. dependencies in
-# config/faster/rules.mk)
-ifneq (,$(filter FasterMake+RecursiveMake,$(BUILD_BACKENDS)))
-install-manifests: faster
-.PHONY: faster
-faster: install-dist/idl
-	$(MAKE) -C faster FASTER_RECURSIVE_MAKE=1
-endif
-
-.PHONY: tup
-tup:
-	$(call BUILDSTATUS,TIERS make tup)
-	$(call BUILDSTATUS,TIER_START make)
-	$(MAKE) install-manifests buildid.h source-repo.h
-	$(call BUILDSTATUS,TIER_FINISH make)
-	$(call BUILDSTATUS,TIER_START tup)
-	@$(TUP) $(if $(findstring s,$(filter-out --%,$(MAKEFLAGS))),,--verbose)
-	$(call BUILDSTATUS,TIER_FINISH tup)
-
-# process_install_manifest needs to be invoked with --no-remove when building
-# js as standalone because automated builds are building nspr separately and
-# that would remove the resulting files.
-# Eventually, a standalone js build would just be able to build nspr itself,
-# removing the need for the former.
-ifdef JS_STANDALONE
-NO_REMOVE=1
-endif
-
-.PHONY: $(addprefix install-,$(subst /,_,$(install_manifests)))
+.PHONY: $(addprefix install-,$(install_manifests))
 $(addprefix install-,$(install_manifests)): install-%: $(install_manifest_depends)
-ifneq (,$(filter FasterMake+RecursiveMake,$(BUILD_BACKENDS)))
-	@# If we're using the hybrid FasterMake/RecursiveMake backend, we want
-	@# to ensure the FasterMake end doesn't have install manifests for the
-	@# same directory, because that would blow up
-	$(if $(wildcard _build_manifests/install/$(subst /,_,$*)),$(if $(wildcard faster/install_$(subst /,_,$*)*),$(error FasterMake and RecursiveMake ends of the hybrid build system want to handle $*)))
-endif
-	$(addprefix $(call py_action,process_install_manifest,$(if $(NO_REMOVE),--no-remove )$*) ,$(wildcard _build_manifests/install/$(subst /,_,$*)))
+	$(addprefix $(call py_action,process_install_manifest,--track install_$(subst /,_,$*).track $*) ,$(wildcard _build_manifests/install/$(subst /,_,$*)))
 
 # Dummy wrapper rule to allow the faster backend to piggy back
 $(addprefix install-,$(subst /,_,$(filter dist/%,$(install_manifests)))): install-dist_%: install-dist/% ;
@@ -217,10 +175,9 @@ install-tests: install-test-files
 .PHONY: run-tests-deps
 run-tests-deps: $(install_manifest_depends)
 
-# Force --no-remove, because $objdir/_tests is handled by multiple manifests.
 .PHONY: install-test-files
 install-test-files:
-	$(call py_action,process_install_manifest,--no-remove _tests _build_manifests/install/_test_files)
+	$(call py_action,process_install_manifest,--track install__test_files.track _tests _build_manifests/install/_test_files)
 
 include $(topsrcdir)/build/moz-automation.mk
 
@@ -240,13 +197,13 @@ ifndef NO_PROFILE_GUIDED_OPTIMIZE
 ifneq ($(OS_ARCH)_$(GNU_CC), WINNT_)
 recurse_pre-export:: install-manifests
 binaries::
-	@$(MAKE) install-manifests NO_REMOVE=1 install_manifests=dist/include
+	@$(MAKE) install-manifests install_manifests=dist/include
 endif
 endif
 else # !MOZ_PROFILE_USE (normal build)
 recurse_pre-export:: install-manifests
 binaries::
-	@$(MAKE) install-manifests NO_REMOVE=1 install_manifests=dist/include
+	@$(MAKE) install-manifests install_manifests=dist/include
 endif
 
 # For historical reasons that are unknown, $(DIST)/sdk is always blown away

README.md

@@ -33,5 +33,7 @@ If you fork this repository to perform your own work on it, please consider offe
 improvement patches upstream to its origin to mutually improve the platform and build
 a future for XUL.
 
-## Looking for Pale Moon and Basilisk?
-As of [`Issue #969`](https://repo.palemoon.org/MoonchildProductions/UXP/issues/969), release versions `28.9.0` and `2020.03.04` respectively, they have been split off into their own dedicated repositories located at [`MoonchildProductions/Pale-Moon`](https://repo.palemoon.org/MoonchildProductions/Pale-Moon) and [`MoonchildProductions/Basilisk`](https://repo.palemoon.org/MoonchildProductions/Basilisk).
+## Looking for Pale Moon?
+As of [`Issue #969`](https://repo.palemoon.org/MoonchildProductions/UXP/issues/969), release version `28.9.0`,
+applications have been split off into their own dedicated (front-end) repositories, with Pale Moon located at
+[`MoonchildProductions/Pale-Moon`](https://repo.palemoon.org/MoonchildProductions/Pale-Moon).

aclocal.m4

@@ -25,7 +25,6 @@ builtin(include, build/autoconf/zlib.m4)dnl
 builtin(include, build/autoconf/icu.m4)dnl
 builtin(include, build/autoconf/clang-plugin.m4)dnl
 builtin(include, build/autoconf/alloc.m4)dnl
-builtin(include, build/autoconf/ios.m4)dnl
 builtin(include, build/autoconf/sanitize.m4)dnl
 
 MOZ_PROG_CHECKMSYS()

build.gradle

@@ -1,129 +0,0 @@
-import java.util.regex.Pattern
-
-allprojects {
-    // Expose the per-object-directory configuration to all projects.
-    ext {
-        mozconfig = gradle.mozconfig
-        topsrcdir = gradle.mozconfig.topsrcdir
-        topobjdir = gradle.mozconfig.topobjdir
-    }
-
-    repositories {
-        if (gradle.mozconfig.substs.GRADLE_MAVEN_REPOSITORY) {
-            maven {
-                url gradle.mozconfig.substs.GRADLE_MAVEN_REPOSITORY
-            }
-        }
-    }
-}
-
-buildDir "${topobjdir}/gradle/build"
-
-buildscript {
-    repositories {
-        if (gradle.mozconfig.substs.GRADLE_MAVEN_REPOSITORY) {
-            maven {
-                url gradle.mozconfig.substs.GRADLE_MAVEN_REPOSITORY
-            }
-        }
-        // For android-sdk-manager SNAPSHOT releases.
-        maven {
-            url "file://${gradle.mozconfig.topsrcdir}/mobile/android/gradle/m2repo"
-        }
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
-        classpath('com.stanfy.spoon:spoon-gradle-plugin:1.0.4') {
-            // Without these, we get errors linting.
-            exclude module: 'guava'
-        }
-        // Provided in tree.
-        classpath 'com.jakewharton.sdkmanager:gradle-plugin:1.5.0-SNAPSHOT'
-    }
-}
-
-task generateCodeAndResources(type:Exec) {
-    workingDir "${topobjdir}"
-
-    commandLine mozconfig.substs.GMAKE
-    args '-C'
-    args "${topobjdir}/mobile/android/base"
-    args 'gradle-targets'
-
-    // Only show the output if something went wrong.
-    ignoreExitValue = true
-    standardOutput = new ByteArrayOutputStream()
-    errorOutput = standardOutput
-    doLast {
-        if (execResult.exitValue != 0) {
-            throw new GradleException("Process '${commandLine}' finished with non-zero exit value ${execResult.exitValue}:\n\n${standardOutput.toString()}")
-        }
-    }
-}
-
-// Skip unit test for all build variants, unless if it was specifically requested by user.
-// The enabled property for the unit test tasks is reset based on the command line task names just before the task execution.
-// I bet there is a easier/cleaner way to do this, but this gets the job done for now.
-Pattern pattern = Pattern.compile('.*test(.+UnitTest)?.*')
-boolean startTasksIncludeTest = gradle.startParameter.taskNames.any {
-    taskName ->
-        taskName.matches(pattern)
-}
-gradle.taskGraph.beforeTask {
-    Task task ->
-        if (task.name.matches(pattern)) {
-            task.enabled = startTasksIncludeTest
-        }
-}
-
-afterEvaluate {
-    subprojects {
-        if (!hasProperty('android')) {
-            return
-        }
-        android.applicationVariants.all {
-            preBuild.dependsOn rootProject.generateCodeAndResources
-        }
-        android.libraryVariants.all {
-            preBuild.dependsOn rootProject.generateCodeAndResources
-        }
-    }
-}
-
-apply plugin: 'idea'
-
-idea {
-    project {
-        languageLevel = '1.7'
-    }
-
-    module {
-        // Object directories take a huge amount of time for IntelliJ to index.
-        // Exclude them.  Convention is that object directories start with obj.
-        // IntelliJ is clever and will not exclude the parts of the object
-        // directory that are referenced, if there are any.  In practice,
-        // indexing the entirety of the tree is taking too long, so exclude all
-        // but mobile/.
-        def topsrcdirURI = file(topsrcdir).toURI()
-        excludeDirs += files(file(topsrcdir)
-            .listFiles({it.isDirectory()} as FileFilter)
-            .collect({topsrcdirURI.relativize(it.toURI()).toString()}) // Relative paths.
-            .findAll({!it.equals('mobile/')}))
-
-        // If topobjdir is below topsrcdir, hide only some portions of that tree.
-        def topobjdirURI = file(topobjdir).toURI()
-        if (!topsrcdirURI.relativize(topobjdirURI).isAbsolute()) {
-            excludeDirs -= file(topobjdir)
-            excludeDirs += files(file(topobjdir).listFiles())
-            excludeDirs -= file("${topobjdir}/gradle")
-        }
-
-        if (!mozconfig.substs.MOZ_INSTALL_TRACKING) {
-            excludeDirs += file("${topsrcdir}/mobile/android/thirdparty/com/adjust")
-        }
-    }
-}
-
-task wrapper(type: Wrapper) {
-}

build/autoconf/icu.m4

@@ -34,11 +34,10 @@ if test -n "$USE_ICU"; then
     ICU_DATA_FILE="icudt${version}l.dat"
 
     dnl We won't build ICU data as a separate file when building
-    dnl JS standalone so that embedders don't have to deal with it.
-    dnl We also don't do it on Windows because sometimes the file goes
-    dnl missing -- possibly due to overzealous antivirus software? --
-    dnl which prevents the browser from starting up :(
-    if test -z "$JS_STANDALONE"; then
+    dnl ICU as a shared library, as we need to fold the data into
+    dnl the shared library in order for consumers like Spidermonkey
+    dnl to use it without code duplication.
+    if test -z "$MOZ_SHARED_ICU"; then
         MOZ_ICU_DATA_ARCHIVE=1
     else
         MOZ_ICU_DATA_ARCHIVE=
@@ -46,17 +45,18 @@ if test -n "$USE_ICU"; then
 fi
 
 AC_SUBST(MOZ_ICU_VERSION)
-AC_SUBST(ENABLE_INTL_API)
 AC_SUBST(USE_ICU)
 AC_SUBST(ICU_DATA_FILE)
 AC_SUBST(MOZ_ICU_DATA_ARCHIVE)
+AC_SUBST(MOZ_SHARED_ICU)
 
 if test -n "$USE_ICU"; then
     if test -z "$YASM" -a -z "$GNU_AS" -a "$COMPILE_ENVIRONMENT"; then
       AC_MSG_ERROR([Building ICU requires either yasm or a GNU assembler. If you do not have either of those available for this platform you must use --without-intl-api])
     fi
-    dnl We build ICU as a static library.
-    AC_DEFINE(U_STATIC_IMPLEMENTATION)
+    if test -z "$MOZ_SHARED_ICU"; then
+       AC_DEFINE(U_STATIC_IMPLEMENTATION)
+    fi
     dnl Source files that use ICU should have control over which parts of the ICU
     dnl namespace they want to use.
     AC_DEFINE(U_USING_ICU_NAMESPACE,0)

build/autoconf/ios.m4

@@ -1,108 +0,0 @@
-dnl This Source Code Form is subject to the terms of the Mozilla Public
-dnl License, v. 2.0. If a copy of the MPL was not distributed with this
-dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-AC_DEFUN([MOZ_IOS_PATH_PROG],
-[
-changequote({,})
-_prog_name=ifelse($2, {}, `echo $1 | tr "[:upper:]" "[:lower:]"`, $2)
-changequote([,])
-AC_CACHE_CHECK([for $_prog_name in iOS SDK],
-ac_cv_ios_path_$1,
-[
-_path=`xcrun --sdk $ios_sdk --find $_prog_name 2>/dev/null`
-_res=$?
-if test $_res -ne 0; then
-   AC_MSG_ERROR([Could not find '$_prog_name' in the iOS SDK])
-fi
-ac_cv_ios_path_$1=$_path
-])
-$1="${ac_cv_ios_path_$1}$3"
-])
-
-AC_DEFUN([MOZ_IOS_SDK],
-[
-
-MOZ_ARG_WITH_STRING(ios-sdk,
-[  --with-ios-sdk=TYPE
-                          Type of iOS SDK to use (iphonesimulator, iphoneos)
-                          and optionally version (like iphoneos8.2)],
-    ios_sdk=$withval)
-
-MOZ_ARG_ENABLE_STRING(ios-target,
-                      [  --enable-ios-target=VER (default=8.0)
-                          Set the minimum iOS version needed at runtime],
-                      [_IOS_TARGET=$enableval])
-_IOS_TARGET_DEFAULT=8.0
-
-case "$target" in
-arm*-apple-darwin*)
-    if test -z "$ios_sdk" -o "$ios_sdk" = "yes"; then
-       ios_sdk=iphoneos
-    fi
-    case "$ios_sdk" in
-         iphoneos*)
-                ios_target_arg="-miphoneos-version-min"
-                ;;
-         *)
-                AC_MSG_ERROR([Only 'iphoneos' SDKs are valid when targeting iOS device, don't know what to do with '$ios_sdk'.])
-                ;;
-    esac
-    ;;
-*-apple-darwin*)
-    ios_target_arg="-mios-simulator-version-min"
-    case "$ios_sdk" in
-         # Empty SDK is okay, this might be an OS X desktop build.
-         ""|iphonesimulator*)
-                ;;
-         # Default to iphonesimulator
-         yes)
-                ios_sdk=iphonesimulator
-                ;;
-         *)
-                AC_MSG_ERROR([Only 'iphonesimulator' SDKs are valid when targeting iOS simulator.])
-                ;;
-    esac
-    ;;
-esac
-
-
-if test -n "$ios_sdk"; then
-   if test -z "$_IOS_TARGET"; then
-      _IOS_TARGET=$_IOS_TARGET_DEFAULT
-      ios_target_arg="${ios_target_arg}=${_IOS_TARGET}"
-   fi
-   # Ensure that xcrun knows where this SDK is.
-   ios_sdk_path=`xcrun --sdk $ios_sdk --show-sdk-path 2>/dev/null`
-   _ret=$?
-   if test $_ret -ne 0; then
-      AC_MSG_ERROR([iOS SDK '$ios_sdk' could not be found.])
-   fi
-   MOZ_IOS=1
-   export HOST_CC=clang
-   export HOST_CXX=clang++
-   # Add isysroot, arch, and ios target arguments
-   case "$target_cpu" in
-        arm*)
-                ARGS="-arch armv7"
-                ;;
-        *)
-                # Unfortunately simulator builds need this.
-                export CROSS_COMPILE=1
-                ;;
-   esac
-   ARGS=" $ARGS -isysroot $ios_sdk_path $ios_target_arg"
-   # Now find our tools
-   MOZ_IOS_PATH_PROG(CC, clang, $ARGS)
-   MOZ_IOS_PATH_PROG(CXX, clang++, $ARGS)
-   export CPP="$CC -E"
-   export LD="$CXX"
-   MOZ_IOS_PATH_PROG(AR)
-   MOZ_IOS_PATH_PROG(AS, as, $ARGS)
-   MOZ_IOS_PATH_PROG(OTOOL)
-   MOZ_IOS_PATH_PROG(STRIP)
-   export PKG_CONFIG_PATH=${ios_sdk_path}/usr/lib/pkgconfig/
-fi
-
-AC_SUBST(MOZ_IOS)
-])

build/autoconf/toolchain.m4

@@ -27,6 +27,9 @@ fi
 if test "`echo | $AS -o conftest.out -v 2>&1 | grep -c GNU`" != "0"; then
     GNU_AS=1
 fi
+if test "`echo | $AS -o conftest.out -v 2>&1 | grep -c Apple`" != "0"; then
+    GNU_AS=1
+fi
 rm -f conftest.out
 if test "`echo | $LD -v 2>&1 | grep -c GNU`" != "0"; then
     GNU_LD=1

build/directive4.py

@@ -1,58 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-# Imports
-from __future__ import print_function, unicode_literals
-
-import os
-import sys
-
-# Sanity check
-if not len(sys.argv) > 1:
-    print("Incorrect number of arguments")
-    sys.exit(1)
-
-# Vars
-listConfigure = sys.argv[1:]
-listConfig = []
-strBrandingDirectory = ""
-listViolations = []
-
-# Build a list of set configure variables
-for _value in listConfigure:
-    _splitString = _value.split("=")
-
-    if _splitString[1] == "1":
-        listConfig += [ _splitString[0] ]
-    elif _splitString[0] == "MOZ_BRANDING_DIRECTORY":
-        strBrandingDirectory = _splitString[1]
-
-# Only applies if using Official Branding or specific branding directories
-if ('MOZ_OFFICIAL_BRANDING' in listConfig) or (strBrandingDirectory.endswith("branding/official")) or (strBrandingDirectory.endswith("branding/unstable")):
-    # Applies to Pale Moon and Basilisk
-    if ('MC_BASILISK' in listConfig) or ('MC_PALEMOON' in listConfig):
-        listViolations += [
-            'MOZ_SYSTEM_JPEG',
-            'MOZ_SYSTEM_ZLIB',
-            'MOZ_SYSTEM_BZ2',
-            'MOZ_SYSTEM_JEMALLOC'
-        ]
-        
-    # Applies to Pale Moon Only
-    if 'MC_PALEMOON' in listConfig:
-        listViolations += [
-            'MOZ_EME',
-            'MOZ_WEBRTC'
-        ]
-    
-    # Iterate through enabled violations and output 1 to DIRECTIVE4 if any are found
-    for _value in listViolations:
-        if _value in listConfig:
-            sys.stdout.write("1")
-            sys.exit(1)
-
-# Exit outputting nothing to DIRECTIVE4 being empty because there are no violations
-sys.exit(0)
-
-

build/docs/cppeclipse.rst

@@ -1,54 +0,0 @@
-.. _build_cppeclipse:
-
-=====================
-Cpp Eclipse Projects
-=====================
-
-For additional information on using Eclipse CDT see
-`the MDN page
-<https://developer.mozilla.org/en-US/docs/Eclipse_CDT>`_.
-
-The build system contains alpha support for generating C++ Eclipse
-project files to aid with development.
-
-Please report bugs to bugzilla and make them depend on bug 973770.
-
-To generate a C++ Eclipse project files, you'll need to have a fully
-built tree::
-
-   mach build
-
-Then, simply generate the Eclipse build backend::
-
-   mach build-backend -b CppEclipse
-
-If all goes well, the path to the generated workspace should be
-printed.
-
-To use the generated Eclipse project files, you'll need to
-have a Eclipse CDT 8.3 (We plan to follow the latest Eclipse release)
-`Eclipse CDT plugin
-<https://www.eclipse.org/cdt/>`_
-installed. You can then import all the projects into Eclipse using
-*File > Import ... > General > Existing Projects into Workspace*
--only- if you have not ran the background indexer.
-
-Updating Project Files
-======================
-
-As you pull and update the source tree, your C++ Eclipse files may
-fall out of sync with the build configuration. The tree should still
-build fine from within Eclipse, but source files may be missing and in
-rare circumstances Eclipse's index may not have the proper build
-configuration.
-
-To account for this, you'll want to periodically regenerate the
-Eclipse project files. You can do this by running ``mach build
-&& mach build-backend -b CppEclipse`` from the
-command line.
-
-Currently, regeneration rewrites the original project files. **If
-you've made any customizations to the projects, they will likely get
-overwritten.** We would like to improve this user experience in the
-future.
-

build/docs/index.rst

@@ -28,14 +28,6 @@ Important Concepts
    locales
    rust
 
-integrated development environment (IDE)
-========================================
-.. toctree::
-   :maxdepth: 1
-
-   cppeclipse
-   visualstudio
-
 mozbuild
 ========
 

build/docs/supported-configurations.rst

@@ -5,41 +5,44 @@ Supported Configurations
 ========================
 
 This page attempts to document supported build configurations.
+For more up-to-date information please go to http://developer.palemoon.org/
 
 Windows
 =======
 
-We support building on Windows XP and newer operating systems using
-Visual Studio 2010 and newer.
+We support building on Windows 7 and newer operating systems using
+Visual Studio 2015 U3.
 
-The following are not fully supported by Mozilla (but may work):
+The following are not fully supported (but may work):
 
-* Building without the latest *MozillaBuild* Windows development
-  environment
+* Building with a *MozillaBuild* Windows development
+  environment not mentioned on the developer documentation site.
 * Building with Mingw or any other non-Visual Studio toolchain.
 
 OS X
 ====
-
-We support building on OS X 10.6 and newer with the OS X 10.6 SDK.
+(This section needs updating)
+We support building on OS X 10.8 and newer with the OS X 10.8 SDK.
 
 The tree should build with the following OS X releases and SDK versions:
 
-* 10.6 Snow Leopard
-* 10.7 Lion
 * 10.8 Mountain Lion
 * 10.9 Mavericks
+* 10.10 Yosemite
+* 10.11 El Capitan
+* 10.12 Sierra
+* 10.13 High Sierra
+* 10.14 Mojave
+* 10.15 Catalina
+* 11 Big Sur (Including Apple ARM SoC)
 
-The tree requires building with Clang 3.3 and newer. This corresponds to
-version of 4.2 of Apple's Clang that ships with Xcode. This corresponds
-to Xcode 4.6 and newer. Xcode 4.6 only runs on OS X 10.7.4 and newer.
-So, OS X 10.6 users will need to install a non-Apple toolchain. Running
-``mach bootstrap`` should install an appropriate toolchain from Homebrew
-or MacPorts automatically.
+The tree requires building with Apple's Clang 4.2 that ships with Xcode.
+This corresponds to Xcode 4.6 and newer. Xcode 4.6 only runs on OS X 10.7.4
+and newer.
 
-The tree should build with GCC 4.4 and newer on OS X. However, this
+The tree should build with GCC 7.1 and newer on OS X. However, this
 build configuration isn't as widely used (and differs from what Mozilla
-uses to produce OS X builds), so it's recommended to stick with Clang.
+uses to produce OS X builds).
 
 Linux
 =====
@@ -47,9 +50,6 @@ Linux
 Linux 2.6 and later kernels are supported.
 
 Most distributions are supported as long as the proper package
-dependencies are in place. Running ``mach bootstrap`` should install
-packages for popular Linux distributions. ``configure`` will typically
+dependencies are in place. ``configure`` will typically
 detect missing dependencies and inform you how to disable features to
 work around unsatisfied dependencies.
-
-Clang 3.3 or GCC 4.4 is required to build the tree.

build/docs/visualstudio.rst

@@ -1,100 +0,0 @@
-.. _build_visualstudio:
-
-======================
-Visual Studio Projects
-======================
-
-The build system contains alpha support for generating Visual Studio
-project files to aid with development.
-
-To generate Visual Studio project files, you'll need to have a configured tree::
-
-   mach configure
-
-(If you have built recently, your tree is already configured.)
-
-Then, simply generate the Visual Studio build backend::
-
-   mach build-backend -b VisualStudio
-
-If all goes well, the path to the generated Solution (``.sln``) file should be
-printed. You should be able to open that solution with Visual Studio 2010 or
-newer.
-
-Currently, output is hard-coded to the Visual Studio 2010 format. If you open
-the solution in a newer Visual Studio release, you will be prompted to upgrade
-projects. Simply click through the wizard to do that.
-
-Structure of Solution
-=====================
-
-The Visual Studio solution consists of hundreds of projects spanning thousands
-of files. To help with organization, the solution is divided into the following
-trees/folders:
-
-Build Targets
-   This folder contains common build targets. The *full* project is used to
-   perform a full build. The *binaries* project is used to build just binaries.
-   The *visual-studio* project can be built to regenerate the Visual Studio
-   project files.
-
-   Performing the *clean* action on any of these targets will clean the
-   *entire* build output.
-
-Binaries
-   This folder contains common binaries that can be executed from within
-   Visual Studio. If you are building the Firefox desktop application,
-   the *firefox* project will launch firefox.exe. You probably want one of
-   these set to your startup project.
-
-Libraries
-   This folder contains entries for each static library that is produced as
-   part of the build. These roughly correspond to each directory in the tree
-   containing C/C++. e.g. code from ``dom/base`` will be contained in the
-   ``dom_base`` project.
-
-   These projects don't do anything when built. If you build a project here,
-   the *binaries* build target project is built.
-
-Updating Project Files
-======================
-
-As you pull and update the source tree, your Visual Studio files may fall out
-of sync with the build configuration. The tree should still build fine from
-within Visual Studio. But source files may be missing and IntelliSense may not
-have the proper build configuration.
-
-To account for this, you'll want to periodically regenerate the Visual Studio
-project files. You can do this within Visual Studio by building the
-``Build Targets :: visual-studio`` project or by running
-``mach build-backend -b VisualStudio`` from the command line.
-
-Currently, regeneration rewrites the original project files. **If you've made
-any customizations to the solution or projects, they will likely get
-overwritten.** We would like to improve this user experience in the
-future.
-
-Moving Project Files Around
-===========================
-
-The produced Visual Studio solution and project files should be portable.
-If you want to move them to a non-default directory, they should continue
-to work from wherever they are. If they don't, please file a bug.
-
-Invoking mach through Visual Studio
-===================================
-
-It's possible to build the tree via Visual Studio. There is some light magic
-involved here.
-
-Alongside the Visual Studio project files is a batch script named ``mach.bat``.
-This batch script sets the environment variables present in your *MozillaBuild*
-development environment at the time of Visual Studio project generation
-and invokes *mach* inside an msys shell with the arguments specified to the
-batch script. This script essentially allows you to invoke mach commands
-inside the MozillaBuild environment without having to load MozillaBuild.
-
-While projects currently only utilize the ``mach build`` command, the batch
-script does not limit it's use: any mach command can be invoked. Developers
-may abuse this fact to add custom projects and commands that invoke other
-mach commands.

build/gyp_base.mozbuild

@@ -16,7 +16,7 @@ if os == 'WINNT':
 flavors = {
     'WINNT': 'win',
     'Linux': 'linux',
-    'Darwin': 'mac' if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa' else 'ios',
+    'Darwin': 'mac',
     'SunOS': 'solaris',
     'GNU/kFreeBSD': 'freebsd',
     'DragonFly': 'dragonfly',

build/mach_bootstrap.py

@@ -100,7 +100,6 @@ MACH_MODULES = [
     'python/mach/mach/commands/settings.py',
     'python/compare-locales/mach_commands.py',
     'python/mozbuild/mozbuild/mach_commands.py',
-    'python/mozbuild/mozbuild/backend/mach_commands.py',
     'python/mozbuild/mozbuild/compilation/codecomplete.py',
     'python/mozbuild/mozbuild/frontend/mach_commands.py',
     'services/common/tests/mach_commands.py',

build/moz.build

@@ -97,10 +97,3 @@ if CONFIG['MOZ_VALGRIND']:
         'valgrind/i386-redhat-linux-gnu.sup',
         'valgrind/x86_64-redhat-linux-gnu.sup',
     ]
-
-if CONFIG['MOZ_ARTIFACT_BUILDS']:
-    # Ensure a pre-built interfaces.xpt installed to the objdir by the artifact
-    # code is included by the top-level chrome.manifest.
-    EXTRA_COMPONENTS += [
-        'prebuilt-interfaces.manifest',
-    ]

build/moz.configure/init.configure

@@ -321,9 +321,6 @@ def split_triplet(triplet):
     elif os.startswith('darwin'):
         canonical_kernel = 'Darwin'
         canonical_os = 'OSX'
-    elif os.startswith('ios'):
-        canonical_kernel = 'Darwin'
-        canonical_os = 'iOS'
     elif os.startswith('dragonfly'):
         canonical_os = canonical_kernel = 'DragonFly'
     elif os.startswith('freebsd'):
@@ -455,10 +452,6 @@ add_old_configure_arg(host_for_old_configure)
 @depends(host, target)
 def target_for_old_configure(host, target):
     target_alias = target.alias
-    # old-configure does plenty of tests against $target and $target_os
-    # and expects darwin for iOS, so make it happy.
-    if target.os == 'iOS':
-        target_alias = target_alias.replace('-ios', '-darwin')
     return '--target=%s' % target_alias
 
 add_old_configure_arg(target_for_old_configure)

build/moz.configure/old.configure

@@ -156,7 +156,9 @@ def old_configure_options(*options):
     '--enable-accessibility',
     '--enable-address-sanitizer',
     '--enable-alsa',
+    '--enable-appcompat-guid',
     '--enable-av1',
+    '--enable-jxl',
     '--enable-b2g-bt',
     '--enable-b2g-camera',
     '--enable-b2g-ril',
@@ -225,6 +227,7 @@ def old_configure_options(*options):
     '--enable-safe-browsing',
     '--enable-sandbox',
     '--enable-security-sqlstore',
+    '--enable-shared-icu',
     '--enable-shared-media',
     '--enable-signmar',
     '--enable-simulator',
@@ -272,6 +275,7 @@ def old_configure_options(*options):
     '--with-ios-sdk',
     '--with-jitreport-granularity',
     '--with-macbundlename-prefix',
+    '--with-macbundle-identity',
     '--with-macos-private-frameworks',
     '--with-macos-sdk',
     '--with-nspr-cflags',
@@ -306,7 +310,6 @@ def old_configure_options(*options):
     '--disable-browser-statusbar',
     '--disable-sync',
     '--disable-personas',
-    '--enable-phoenix-extensions',
     
     # Below are configure flags used by Basilisk
     '--disable-webextensions',

build/moz.configure/toolchain.configure

@@ -383,57 +383,65 @@ def check_compiler(compiler, language, target):
     )
 
 
-@imports(_from='collections', _import='defaultdict')
+@imports(_from='__builtin__', _import='open')
+@imports('json')
+@imports('subprocess')
+@imports('sys')
+def get_vc_paths(topsrcdir):
+    def vswhere(args):
+        encoding = 'mbcs' if sys.platform == 'win32' else 'utf-8'
+        return json.loads(subprocess.check_output([os.path.join(topsrcdir, 'build/win32/vswhere.exe'), '-format', 'json'] + args).decode(encoding, 'replace'))
+
+    # Can't pass -requires with -legacy, so query each separately.
+    # Legacy versions first (VS2015)
+    for install in vswhere(['-legacy', '-version', '[14.0,15.0)']):
+        version = Version(install['installationVersion'])
+        # Skip anything older than VS2015.
+        if version < '14':
+            continue
+        path = install['installationPath']
+
+        yield (Version(install['installationVersion']), {
+            'x64': [os.path.join(path, r'VC\bin\amd64')],
+            # The x64->x86 cross toolchain requires DLLs from the native x64 toolchain.
+            'x86': [os.path.join(path, r'VC\bin\amd64_x86'), os.path.join (path, r'VC\bin\amd64')],
+        })
+    # Then VS2017 and newer.
+    for install in vswhere(['-requires', 'Microsoft.VisualStudio.Component.VC.Tools.x86.x64']):
+        path = install['installationPath']
+        tools_version = open(os.path.join(path, r'VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt'), 'rb').read().strip()
+        tools_path = os.path.join(path, r'VC\Tools\MSVC', tools_version, r'bin\HostX64')
+        yield (Version(install['installationVersion']), {
+            'x64': [os.path.join(tools_path, 'x64')],
+            # The x64->x86 cross toolchain requires DLLs from the native x64 toolchain.
+            'x86': [os.path.join(tools_path, 'x86'), os.path.join(tools_path, 'x64')],
+        })
+
+
+@depends(host, target, check_build_environment)
 @imports(_from='__builtin__', _import='sorted')
-def get_vc_paths(base):
-    vc = defaultdict(lambda: defaultdict(dict))
-    subkey = r'Microsoft\VisualStudio\VC\*\*\*\Compiler'
-    for v, h, t, p in get_registry_values(base + '\\' + subkey):
-        vc[v][h][t] = p
-    if not vc:
-        return
-    version, data = sorted(vc.iteritems(), key=lambda x: Version(x[0]))[-1]
-    return data
-
-
-@depends(host)
+@imports(_from='operator', _import='itemgetter')
 @imports('platform')
-def vc_compiler_path(host):
+def vc_compiler_path(host, target, env):
     if host.kernel != 'WINNT':
         return
-    vc_host = {
-        'x86': 'x86',
-        'AMD64': 'x64',
-    }.get(platform.machine())
-    if vc_host is None:
-        return
     vc_target = {
         'x86': 'x86',
         'x86_64': 'x64',
         'arm': 'arm',
-    }.get(host.cpu)
+    }.get(target.cpu)
     if vc_target is None:
         return
-
-    base_key = r'HKEY_LOCAL_MACHINE\SOFTWARE'
-    data = get_vc_paths(base_key)
-    if not data:
-        data = get_vc_paths(base_key + r'\Wow6432Node')
-    if not data:
+    all_versions = sorted(get_vc_paths(env.topsrcdir), key=itemgetter(0))
+    if not all_versions:
         return
 
-    path = data.get(vc_host, {}).get(vc_target)
-    if not path and vc_host == 'x64':
-        vc_host = 'x86'
-        path = data.get(vc_host, {}).get(vc_target)
-    if not path:
+    # Choose the newest version.
+    data = all_versions[-1][1]
+    paths = data.get(vc_target)
+    if not paths:
         return
-    path = os.path.dirname(path)
-    if vc_host != vc_target:
-        other_path = data.get(vc_host, {}).get(vc_host)
-        if other_path:
-            return (path, os.path.dirname(other_path))
-    return (path,)
+    return paths
 
 
 @depends(vc_compiler_path)

build/moz.configure/windows.configure

@@ -261,13 +261,17 @@ def vc_path(c_compiler):
             break
     return result
 
-
-@depends_win(vc_path)
+@depends_win(vc_path, c_compiler)
 @checking('for the Debug Interface Access SDK', lambda x: x or 'not found')
 @imports(_from='os.path', _import='isdir')
-def dia_sdk_dir(vc_path):
+def dia_sdk_dir(vc_path, c_compiler):
     if vc_path:
-        path = os.path.join(os.path.dirname(vc_path), 'DIA SDK')
+        if c_compiler.version < '19.10':
+            path = os.path.join(os.path.dirname(vc_path), 'DIA SDK')
+        else:
+            # This would be easier if we had the installationPath that
+            # get_vc_paths works with, since 'DIA SDK' is relative to that.
+             path = os.path.normpath(os.path.join(vc_path, r'..\..\..\..\DIA SDK'))
         if isdir(path):
             return path
 
@@ -309,29 +313,36 @@ def include_path(vc_path, windows_sdk_dir, ucrt_sdk_dir, dia_sdk_dir):
 set_config('INCLUDE', include_path)
 
 
-@depends_win(target, vc_path, valid_windows_sdk_dir, valid_ucrt_sdk_dir, dia_sdk_dir)
+@depends_win(target, c_compiler, vc_path, valid_windows_sdk_dir, valid_ucrt_sdk_dir, dia_sdk_dir)
 @imports('os')
-def lib_path(target, vc_path, windows_sdk_dir, ucrt_sdk_dir, dia_sdk_dir):
+def lib_path(target, c_compiler, vc_path, windows_sdk_dir, ucrt_sdk_dir, dia_sdk_dir):
     if not vc_path:
         return
-    vc_target = {
-        'x86': '',
-        'x86_64': 'amd64',
-        'arm': 'arm',
-    }.get(target.cpu)
-    if vc_target is None:
-        return
-    # As vc_target can be '', and os.path.join will happily use the empty
-    # string, leading to a string ending with a backslash, that Make will
-    # interpret as a "string continues on next line" indicator, use variable
-    # args.
-    vc_target = (vc_target,) if vc_target else ()
     sdk_target = {
         'x86': 'x86',
         'x86_64': 'x64',
         'arm': 'arm',
     }.get(target.cpu)
 
+    old_target = {
+        'x86': '',
+        'x86_64': 'amd64',
+        'arm': 'arm',
+    }.get(target.cpu)
+    if old_target is None:
+        return
+    # As old_target can be '', and os.path.join will happily use the empty
+    # string, leading to a string ending with a backslash, that Make will
+    # interpret as a "string continues on next line" indicator, use variable
+    # args.
+    old_target = (old_target,) if old_target else ()
+    if c_compiler.version < '19.10':
+        # MSVC2015
+        vc_target = old_target
+    else:
+        # MSVC2017 switched to use the same target naming as the sdk.
+        vc_target = (sdk_target,)
+
     atlmfc_dir = os.path.join(vc_path, 'atlmfc', 'lib', *vc_target)
     if not os.path.isdir(atlmfc_dir):
         die('Cannot find the ATL/MFC libraries in the Visual C++ directory (%s). '
@@ -349,7 +360,9 @@ def lib_path(target, vc_path, windows_sdk_dir, ucrt_sdk_dir, dia_sdk_dir):
         os.path.join(ucrt_sdk_dir.lib, 'ucrt', sdk_target),
     ))
     if dia_sdk_dir:
-        libs.append(os.path.join(dia_sdk_dir, 'lib', *vc_target))
+        # For some reason the DIA SDK still uses the old-style targets
+        # even in a newer MSVC.
+        libs.append(os.path.join(dia_sdk_dir, 'lib', *old_target))
     # Set in the environment for old-configure
     libs = os.pathsep.join(libs)
     os.environ['LIB'] = libs

caps/BasePrincipal.h

@@ -287,8 +287,6 @@ public:
 
   virtual bool AddonHasPermission(const nsAString& aPerm);
 
-  virtual bool IsOnCSSUnprefixingWhitelist() override { return false; }
-
   virtual bool IsCodebasePrincipal() const { return false; };
 
   static BasePrincipal* Cast(nsIPrincipal* aPrin) { return static_cast<BasePrincipal*>(aPrin); }

caps/nsIPrincipal.idl

@@ -21,7 +21,7 @@ interface nsIDOMDocument;
 [ptr] native JSPrincipals(JSPrincipals);
 [ptr] native PrincipalArray(nsTArray<nsCOMPtr<nsIPrincipal> >);
 
-[scriptable, builtinclass, uuid(3da7b133-f1a0-4de9-a2bc-5c49014c1077)]
+[scriptable, builtinclass, uuid(f75f502d-79fd-48be-a079-e5a7b8f80c8b)]
 interface nsIPrincipal : nsISerializable
 {
     /**
@@ -333,15 +333,6 @@ interface nsIPrincipal : nsISerializable
      * Returns true iff this is the system principal.
      */
     [infallible] readonly attribute boolean isSystemPrincipal;
-
-    /**
-     * Returns true if this principal's origin is recognized as being on the
-     * whitelist of sites that can use the CSS Unprefixing Service.
-     *
-     * (This interface provides a trivial implementation, just returning false;
-     * subclasses can implement something more complex as-needed.)
-     */
-    [noscript,notxpcom,nostdcall] bool IsOnCSSUnprefixingWhitelist();
 };
 
 /**

caps/nsJSPrincipals.cpp

@@ -85,7 +85,7 @@ nsJSPrincipals::Destroy(JSPrincipals *jsprin)
 #ifdef DEBUG
 
 // Defined here so one can do principals->dump() in the debugger
-JS_PUBLIC_API(void)
+void
 JSPrincipals::dump()
 {
     if (debugToken == nsJSPrincipals::DEBUG_TOKEN) {

caps/nsPrincipal.cpp

@@ -35,7 +35,6 @@
 
 using namespace mozilla;
 
-static bool gIsWhitelistingTestDomains = false;
 static bool gCodeBasePrincipalSupport = false;
 
 static bool URIIsImmutable(nsIURI* aURI)
@@ -61,10 +60,6 @@ NS_IMPL_CI_INTERFACE_GETTER(nsPrincipal,
 /* static */ void
 nsPrincipal::InitializeStatics()
 {
-  Preferences::AddBoolVarCache(
-    &gIsWhitelistingTestDomains,
-    "layout.css.unprefixing-service.include-test-domains");
-
   Preferences::AddBoolVarCache(&gCodeBasePrincipalSupport,
                                "signed.applets.codebase_principal_support",
                                false);
@@ -483,196 +478,6 @@ nsPrincipal::Write(nsIObjectOutputStream* aStream)
   return NS_OK;
 }
 
-// Helper-function to indicate whether the CSS Unprefixing Service
-// whitelist should include dummy domains that are only intended for
-// use in testing. (Controlled by a pref.)
-static inline bool
-IsWhitelistingTestDomains()
-{
-  return gIsWhitelistingTestDomains;
-}
-
-// Checks if the given URI's host is on our "full domain" whitelist
-// (i.e. if it's an exact match against a domain that needs unprefixing)
-static bool
-IsOnFullDomainWhitelist(nsIURI* aURI)
-{
-  nsAutoCString hostStr;
-  nsresult rv = aURI->GetHost(hostStr);
-  NS_ENSURE_SUCCESS(rv, false);
-
-  // NOTE: This static whitelist is expected to be short. If that changes,
-  // we should consider a different representation; e.g. hash-set, prefix tree.
-  static const nsLiteralCString sFullDomainsOnWhitelist[] = {
-    // 0th entry only active when testing:
-    NS_LITERAL_CSTRING("test1.example.org"),
-    NS_LITERAL_CSTRING("map.baidu.com"),
-    NS_LITERAL_CSTRING("3g.163.com"),
-    NS_LITERAL_CSTRING("3glogo.gtimg.com"), // for 3g.163.com
-    NS_LITERAL_CSTRING("info.3g.qq.com"), // for 3g.qq.com
-    NS_LITERAL_CSTRING("3gimg.qq.com"), // for 3g.qq.com
-    NS_LITERAL_CSTRING("img.m.baidu.com"), // for [shucheng|ks].baidu.com
-    NS_LITERAL_CSTRING("m.mogujie.com"),
-    NS_LITERAL_CSTRING("touch.qunar.com"),
-    NS_LITERAL_CSTRING("mjs.sinaimg.cn"), // for sina.cn
-    NS_LITERAL_CSTRING("static.qiyi.com"), // for m.iqiyi.com
-    NS_LITERAL_CSTRING("cdn.kuaidi100.com"), // for m.kuaidi100.com
-    NS_LITERAL_CSTRING("m.pc6.com"),
-    NS_LITERAL_CSTRING("m.haosou.com"),
-    NS_LITERAL_CSTRING("m.mi.com"),
-    NS_LITERAL_CSTRING("wappass.baidu.com"),
-    NS_LITERAL_CSTRING("m.video.baidu.com"),
-    NS_LITERAL_CSTRING("m.video.baidu.com"),
-    NS_LITERAL_CSTRING("imgcache.gtimg.cn"), // for m.v.qq.com
-    NS_LITERAL_CSTRING("s.tabelog.jp"),
-    NS_LITERAL_CSTRING("s.yimg.jp"), // for s.tabelog.jp
-    NS_LITERAL_CSTRING("i.yimg.jp"), // for *.yahoo.co.jp
-    NS_LITERAL_CSTRING("ai.yimg.jp"), // for *.yahoo.co.jp
-    NS_LITERAL_CSTRING("m.finance.yahoo.co.jp"),
-    NS_LITERAL_CSTRING("daily.c.yimg.jp"), // for sp.daily.co.jp
-    NS_LITERAL_CSTRING("stat100.ameba.jp"), // for ameblo.jp
-    NS_LITERAL_CSTRING("user.ameba.jp"), // for ameblo.jp
-    NS_LITERAL_CSTRING("www.goo.ne.jp"),
-    NS_LITERAL_CSTRING("x.gnst.jp"), // for mobile.gnavi.co.jp
-    NS_LITERAL_CSTRING("c.x.gnst.jp"), // for mobile.gnavi.co.jp
-    NS_LITERAL_CSTRING("www.smbc-card.com"),
-    NS_LITERAL_CSTRING("static.card.jp.rakuten-static.com"), // for rakuten-card.co.jp
-    NS_LITERAL_CSTRING("img.travel.rakuten.co.jp"), // for travel.rakuten.co.jp
-    NS_LITERAL_CSTRING("img.mixi.net"), // for mixi.jp
-    NS_LITERAL_CSTRING("girlschannel.net"),
-    NS_LITERAL_CSTRING("www.fancl.co.jp"),
-    NS_LITERAL_CSTRING("s.cosme.net"),
-    NS_LITERAL_CSTRING("www.sapporobeer.jp"),
-    NS_LITERAL_CSTRING("www.mapion.co.jp"),
-    NS_LITERAL_CSTRING("touch.navitime.co.jp"),
-    NS_LITERAL_CSTRING("sp.mbga.jp"),
-    NS_LITERAL_CSTRING("ava-a.sp.mbga.jp"), // for sp.mbga.jp
-    NS_LITERAL_CSTRING("www.ntv.co.jp"),
-    NS_LITERAL_CSTRING("mobile.suntory.co.jp"), // for suntory.jp
-    NS_LITERAL_CSTRING("www.aeonsquare.net"),
-    NS_LITERAL_CSTRING("mw.nikkei.com"),
-    NS_LITERAL_CSTRING("www.nhk.or.jp"),
-    NS_LITERAL_CSTRING("www.tokyo-sports.co.jp"),
-    NS_LITERAL_CSTRING("www.bellemaison.jp"),
-    NS_LITERAL_CSTRING("www.kuronekoyamato.co.jp"),
-    NS_LITERAL_CSTRING("formassist.jp"), // for orico.jp
-    NS_LITERAL_CSTRING("sp.m.reuters.co.jp"),
-    NS_LITERAL_CSTRING("www.atre.co.jp"),
-    NS_LITERAL_CSTRING("www.jtb.co.jp"),
-    NS_LITERAL_CSTRING("www.sharp.co.jp"),
-    NS_LITERAL_CSTRING("www.biccamera.com"),
-    NS_LITERAL_CSTRING("weathernews.jp"),
-    NS_LITERAL_CSTRING("cache.ymail.jp"), // for www.yamada-denkiweb.com
-  };
-  static const size_t sNumFullDomainsOnWhitelist =
-    MOZ_ARRAY_LENGTH(sFullDomainsOnWhitelist);
-
-  // Skip 0th (dummy) entry in whitelist, unless a pref is enabled.
-  const size_t firstWhitelistIdx = IsWhitelistingTestDomains() ? 0 : 1;
-
-  for (size_t i = firstWhitelistIdx; i < sNumFullDomainsOnWhitelist; ++i) {
-    if (hostStr == sFullDomainsOnWhitelist[i]) {
-      return true;
-    }
-  }
-  return false;
-}
-
-// Checks if the given URI's host is on our "base domain" whitelist
-// (i.e. if it's a subdomain of some host that we've whitelisted as needing
-// unprefixing for all its subdomains)
-static bool
-IsOnBaseDomainWhitelist(nsIURI* aURI)
-{
-  static const nsLiteralCString sBaseDomainsOnWhitelist[] = {
-    // 0th entry only active when testing:
-    NS_LITERAL_CSTRING("test2.example.org"),
-    NS_LITERAL_CSTRING("tbcdn.cn"), // for m.taobao.com
-    NS_LITERAL_CSTRING("alicdn.com"), // for m.taobao.com
-    NS_LITERAL_CSTRING("dpfile.com"), // for m.dianping.com
-    NS_LITERAL_CSTRING("hao123img.com"), // for hao123.com
-    NS_LITERAL_CSTRING("tabelog.k-img.com"), // for s.tabelog.com
-    NS_LITERAL_CSTRING("tsite.jp"), // for *.tsite.jp
-  };
-  static const size_t sNumBaseDomainsOnWhitelist =
-    MOZ_ARRAY_LENGTH(sBaseDomainsOnWhitelist);
-
-  nsCOMPtr<nsIEffectiveTLDService> tldService =
-    do_GetService(NS_EFFECTIVETLDSERVICE_CONTRACTID);
-
-  if (tldService) {
-    // Skip 0th test-entry in whitelist, unless the testing pref is enabled.
-    const size_t firstWhitelistIdx = IsWhitelistingTestDomains() ? 0 : 1;
-
-    // Right now, the test base-domain "test2.example.org" is the only entry in
-    // its whitelist with a nonzero "depth". So we'll only bother going beyond
-    // 0 depth (to 1) if that entry is enabled. (No point in slowing down the
-    // normal codepath, for the benefit of a disabled test domain.)  If we add a
-    // "real" base-domain with a depth of >= 1 to our whitelist, we can get rid
-    // of this conditional & just make this a static variable.
-    const uint32_t maxSubdomainDepth = IsWhitelistingTestDomains() ? 1 : 0;
-
-    for (uint32_t subdomainDepth = 0;
-         subdomainDepth <= maxSubdomainDepth; ++subdomainDepth) {
-
-      // Get the base domain (to depth |subdomainDepth|) from passed-in URI:
-      nsAutoCString baseDomainStr;
-      nsresult rv = tldService->GetBaseDomain(aURI, subdomainDepth,
-                                              baseDomainStr);
-      if (NS_FAILED(rv)) {
-        // aURI doesn't have |subdomainDepth| levels of subdomains. If we got
-        // here without a match yet, then aURI is not on our whitelist.
-        return false;
-      }
-
-      // Compare the base domain against each entry in our whitelist:
-      for (size_t i = firstWhitelistIdx; i < sNumBaseDomainsOnWhitelist; ++i) {
-        if (baseDomainStr == sBaseDomainsOnWhitelist[i]) {
-          return true;
-        }
-      }
-    }
-  }
-
-  return false;
-}
-
-// The actual (non-cached) implementation of IsOnCSSUnprefixingWhitelist():
-static bool
-IsOnCSSUnprefixingWhitelistImpl(nsIURI* aURI)
-{
-  // Check scheme, so we can drop any non-HTTP/HTTPS URIs right away
-  nsAutoCString schemeStr;
-  nsresult rv = aURI->GetScheme(schemeStr);
-  NS_ENSURE_SUCCESS(rv, false);
-
-  // Only proceed if scheme is "http" or "https"
-  if (!(StringBeginsWith(schemeStr, NS_LITERAL_CSTRING("http")) &&
-        (schemeStr.Length() == 4 ||
-         (schemeStr.Length() == 5 && schemeStr[4] == 's')))) {
-    return false;
-  }
-
-  return (IsOnFullDomainWhitelist(aURI) ||
-          IsOnBaseDomainWhitelist(aURI));
-}
-
-
-bool
-nsPrincipal::IsOnCSSUnprefixingWhitelist()
-{
-  if (mIsOnCSSUnprefixingWhitelist.isNothing()) {
-    // Value not cached -- perform our lazy whitelist-check.
-    // (NOTE: If our URI is mutable, we just assume it's not on the whitelist,
-    // since our caching strategy won't work. This isn't expected to be common.)
-    mIsOnCSSUnprefixingWhitelist.emplace(
-      mCodebaseImmutable &&
-      IsOnCSSUnprefixingWhitelistImpl(mCodebase));
-  }
-
-  return *mIsOnCSSUnprefixingWhitelist;
-}
-
 /************************************************************************************************************************/
 
 NS_IMPL_CLASSINFO(nsExpandedPrincipal, nullptr, nsIClassInfo::MAIN_THREAD_ONLY,
@@ -837,15 +642,6 @@ nsExpandedPrincipal::AddonHasPermission(const nsAString& aPerm)
   return false;
 }
 
-bool
-nsExpandedPrincipal::IsOnCSSUnprefixingWhitelist()
-{
-  // CSS Unprefixing Whitelist is a per-origin thing; doesn't really make sense
-  // for an expanded principal. (And probably shouldn't be needed.)
-  return false;
-}
-
-
 nsresult
 nsExpandedPrincipal::GetScriptLocation(nsACString& aStr)
 {

caps/nsPrincipal.h

@@ -25,7 +25,6 @@ public:
   NS_IMETHOD GetDomain(nsIURI** aDomain) override;
   NS_IMETHOD SetDomain(nsIURI* aDomain) override;
   NS_IMETHOD GetBaseDomain(nsACString& aBaseDomain) override;
-  virtual bool IsOnCSSUnprefixingWhitelist() override;
   bool IsCodebasePrincipal() const override { return true; }
   nsresult GetOriginInternal(nsACString& aOrigin) override;
 
@@ -55,7 +54,6 @@ public:
   bool mCodebaseImmutable;
   bool mDomainImmutable;
   bool mInitialized;
-  mozilla::Maybe<bool> mIsOnCSSUnprefixingWhitelist; // Lazily-computed
 
 protected:
   virtual ~nsPrincipal();
@@ -81,7 +79,6 @@ public:
   NS_IMETHOD SetDomain(nsIURI* aDomain) override;
   NS_IMETHOD GetBaseDomain(nsACString& aBaseDomain) override;
   virtual bool AddonHasPermission(const nsAString& aPerm) override;
-  virtual bool IsOnCSSUnprefixingWhitelist() override;
   virtual nsresult GetScriptLocation(nsACString &aStr) override;
   nsresult GetOriginInternal(nsACString& aOrigin) override;
 

caps/tests/mochitest/browser_checkloaduri.js

@@ -58,7 +58,6 @@ const URLs = new Map([
     ["data:text/html,Hi", true, false, true],
     ["view-source:data:text/html,Hi", false, false, true],
     ["javascript:alert('hi')", true, false, true],
-    ["moz://a", false, false, true],
     ["about:test-chrome-privs", false, false, true],
     ["about:test-unknown-unlinkable", false, false, true],
     ["about:test-content-unlinkable", false, false, true],
@@ -80,7 +79,6 @@ const URLs = new Map([
     ["data:text/html,Hi", true, false, true],
     ["view-source:data:text/html,Hi", false, false, true],
     ["javascript:alert('hi')", true, false, true],
-    ["moz://a", false, false, true],
     ["about:test-chrome-privs", false, false, true],
     ["about:test-unknown-unlinkable", false, false, true],
     ["about:test-content-unlinkable", false, false, true],
@@ -102,7 +100,6 @@ const URLs = new Map([
     ["data:text/html,Hi", true, false, true],
     ["view-source:data:text/html,Hi", true, false, true],
     ["javascript:alert('hi')", true, false, true],
-    ["moz://a", false, false, true],
     ["about:test-chrome-privs", false, false, true],
     ["about:test-unknown-unlinkable", false, false, true],
     ["about:test-content-unlinkable", false, false, true],

config/baseconfig.mk

@@ -45,7 +45,7 @@ endif # WINNT
 ifndef INCLUDED_AUTOCONF_MK
 default::
 else
-TIERS := $(if $(MOZ_ARTIFACT_BUILDS),artifact )pre-export export $(if $(COMPILE_ENVIRONMENT),compile )misc libs tools
+TIERS := pre-export export $(if $(COMPILE_ENVIRONMENT),compile )misc libs tools
 endif
 
 # These defines are used to support the twin-topsrcdir model for comm-central.

config/check_spidermonkey_style.py

@@ -86,12 +86,14 @@ included_inclnames_to_ignore = set([
     'unicode/ucol.h',           # ICU
     'unicode/udat.h',           # ICU
     'unicode/udatpg.h',         # ICU
+    'unicode/udisplaycontext.h',# ICU
     'unicode/uenum.h',          # ICU
     'unicode/uniset.h',         # ICU
-    'unicode/unorm.h',          # ICU
+    'unicode/unorm2.h',         # ICU
     'unicode/unum.h',           # ICU
     'unicode/unumsys.h',        # ICU
     'unicode/upluralrules.h',   # ICU
+    'unicode/ureldatefmt.h',    # ICU
     'unicode/ustring.h',        # ICU
     'unicode/utypes.h',         # ICU
     'vtune/VTuneWrapper.h'      # VTune

config/config.mk

@@ -377,8 +377,20 @@ endif # WINNT
 
 ifdef _MSC_VER
 ifeq ($(CPU_ARCH),x86_64)
-# set stack to 2MB on x64 build.  See bug 582910
-WIN32_EXE_LDFLAGS	+= -STACK:2097152
+# Normal operation on 64-bit Windows needs 2 MB of stack. (Bug 582910)
+# ASAN requires 6 MB of stack.
+# Setting the stack to 8 MB to match the capability of other systems
+# to deal with frame construction for unreasonably deep DOM trees
+# with worst-case styling. This uses address space unnecessarily for
+# non-main threads, but that should be tolerable on 64-bit systems.
+WIN32_EXE_LDFLAGS      += -STACK:8388608
+else
+# Since this setting affects the default stack size for non-main
+# threads, too, to avoid burning the address space, increase only
+# 512 KB over the default. Just enough to be able to deal with
+# reasonable styling applied to DOM trees whose depth is near what
+# Blink's HTML parser can output.
+WIN32_EXE_LDFLAGS      += -STACK:1572864
 endif
 endif
 

config/expandlibs_exec.py

@@ -45,6 +45,7 @@ SECTION_INSERT_BEFORE = [
   ('.text', '.fini'),
   ('.rodata', '.rodata1'),
   ('.data.rel.ro', '.dynamic'),
+  ('.kPStaticModules', '.data.rel.ro'),
   ('.data', '.data1'),
 ]
 

config/external/ffi/moz.build

@@ -121,6 +121,8 @@ else:
             DEFINES['SYMBOL_UNDERSCORE'] = True
         else:
             ffi_srcs = ('ffi.c', 'darwin.S', 'ffi64.c', 'darwin64.S')
+    elif CONFIG['FFI_TARGET'] == 'AARCH64_DARWIN':
+        ffi_srcs = ('sysv.S', 'ffi.c')
 
     SOURCES += [
         '/js/src/ctypes/libffi/src/%s/%s' % (CONFIG['FFI_TARGET_DIR'], s)

config/external/icu/common/sources.mozbuild

@@ -4,26 +4,28 @@ SOURCES += [
    '/intl/icu/source/common/bmpset.cpp',
    '/intl/icu/source/common/brkeng.cpp',
    '/intl/icu/source/common/brkiter.cpp',
+   '/intl/icu/source/common/bytesinkutil.cpp',
    '/intl/icu/source/common/bytestream.cpp',
    '/intl/icu/source/common/bytestrie.cpp',
    '/intl/icu/source/common/bytestriebuilder.cpp',
    '/intl/icu/source/common/bytestrieiterator.cpp',
    '/intl/icu/source/common/caniter.cpp',
+   '/intl/icu/source/common/characterproperties.cpp',
    '/intl/icu/source/common/chariter.cpp',
    '/intl/icu/source/common/charstr.cpp',
-   '/intl/icu/source/common/cmemory.c',
+   '/intl/icu/source/common/cmemory.cpp',
    '/intl/icu/source/common/cstr.cpp',
-   '/intl/icu/source/common/cstring.c',
-   '/intl/icu/source/common/cwchar.c',
+   '/intl/icu/source/common/cstring.cpp',
+   '/intl/icu/source/common/cwchar.cpp',
    '/intl/icu/source/common/dictbe.cpp',
    '/intl/icu/source/common/dictionarydata.cpp',
    '/intl/icu/source/common/dtintrv.cpp',
+   '/intl/icu/source/common/edits.cpp',
    '/intl/icu/source/common/errorcode.cpp',
    '/intl/icu/source/common/filteredbrk.cpp',
    '/intl/icu/source/common/filterednormalizer2.cpp',
-   '/intl/icu/source/common/icudataver.c',
+   '/intl/icu/source/common/icudataver.cpp',
    '/intl/icu/source/common/icuplug.cpp',
-   '/intl/icu/source/common/listformatter.cpp',
    '/intl/icu/source/common/loadednormalizer2impl.cpp',
    '/intl/icu/source/common/locavailable.cpp',
    '/intl/icu/source/common/locbased.cpp',
@@ -31,7 +33,7 @@ SOURCES += [
    '/intl/icu/source/common/locdspnm.cpp',
    '/intl/icu/source/common/locid.cpp',
    '/intl/icu/source/common/loclikely.cpp',
-   '/intl/icu/source/common/locmap.c',
+   '/intl/icu/source/common/locmap.cpp',
    '/intl/icu/source/common/locresdata.cpp',
    '/intl/icu/source/common/locutil.cpp',
    '/intl/icu/source/common/messagepattern.cpp',
@@ -42,10 +44,11 @@ SOURCES += [
    '/intl/icu/source/common/patternprops.cpp',
    '/intl/icu/source/common/pluralmap.cpp',
    '/intl/icu/source/common/propname.cpp',
-   '/intl/icu/source/common/propsvec.c',
+   '/intl/icu/source/common/propsvec.cpp',
    '/intl/icu/source/common/punycode.cpp',
    '/intl/icu/source/common/putil.cpp',
    '/intl/icu/source/common/rbbi.cpp',
+   '/intl/icu/source/common/rbbi_cache.cpp',
    '/intl/icu/source/common/rbbidata.cpp',
    '/intl/icu/source/common/rbbinode.cpp',
    '/intl/icu/source/common/rbbirb.cpp',
@@ -67,68 +70,70 @@ SOURCES += [
    '/intl/icu/source/common/servslkf.cpp',
    '/intl/icu/source/common/sharedobject.cpp',
    '/intl/icu/source/common/simpleformatter.cpp',
+   '/intl/icu/source/common/static_unicode_sets.cpp',
    '/intl/icu/source/common/stringpiece.cpp',
    '/intl/icu/source/common/stringtriebuilder.cpp',
-   '/intl/icu/source/common/uarrsort.c',
-   '/intl/icu/source/common/ubidi.c',
-   '/intl/icu/source/common/ubidi_props.c',
-   '/intl/icu/source/common/ubidiln.c',
-   '/intl/icu/source/common/ubiditransform.c',
-   '/intl/icu/source/common/ubidiwrt.c',
+   '/intl/icu/source/common/uarrsort.cpp',
+   '/intl/icu/source/common/ubidi.cpp',
+   '/intl/icu/source/common/ubidi_props.cpp',
+   '/intl/icu/source/common/ubidiln.cpp',
+   '/intl/icu/source/common/ubiditransform.cpp',
+   '/intl/icu/source/common/ubidiwrt.cpp',
    '/intl/icu/source/common/ubrk.cpp',
    '/intl/icu/source/common/ucase.cpp',
    '/intl/icu/source/common/ucasemap.cpp',
    '/intl/icu/source/common/ucasemap_titlecase_brkiter.cpp',
-   '/intl/icu/source/common/ucat.c',
-   '/intl/icu/source/common/uchar.c',
+   '/intl/icu/source/common/ucat.cpp',
+   '/intl/icu/source/common/uchar.cpp',
    '/intl/icu/source/common/ucharstrie.cpp',
    '/intl/icu/source/common/ucharstriebuilder.cpp',
    '/intl/icu/source/common/ucharstrieiterator.cpp',
    '/intl/icu/source/common/uchriter.cpp',
    '/intl/icu/source/common/ucln_cmn.cpp',
-   '/intl/icu/source/common/ucmndata.c',
-   '/intl/icu/source/common/ucnv.c',
+   '/intl/icu/source/common/ucmndata.cpp',
+   '/intl/icu/source/common/ucnv.cpp',
    '/intl/icu/source/common/ucnv2022.cpp',
    '/intl/icu/source/common/ucnv_bld.cpp',
-   '/intl/icu/source/common/ucnv_cb.c',
-   '/intl/icu/source/common/ucnv_cnv.c',
-   '/intl/icu/source/common/ucnv_ct.c',
-   '/intl/icu/source/common/ucnv_err.c',
+   '/intl/icu/source/common/ucnv_cb.cpp',
+   '/intl/icu/source/common/ucnv_cnv.cpp',
+   '/intl/icu/source/common/ucnv_ct.cpp',
+   '/intl/icu/source/common/ucnv_err.cpp',
    '/intl/icu/source/common/ucnv_ext.cpp',
    '/intl/icu/source/common/ucnv_io.cpp',
-   '/intl/icu/source/common/ucnv_lmb.c',
-   '/intl/icu/source/common/ucnv_set.c',
-   '/intl/icu/source/common/ucnv_u16.c',
-   '/intl/icu/source/common/ucnv_u32.c',
-   '/intl/icu/source/common/ucnv_u7.c',
-   '/intl/icu/source/common/ucnv_u8.c',
+   '/intl/icu/source/common/ucnv_lmb.cpp',
+   '/intl/icu/source/common/ucnv_set.cpp',
+   '/intl/icu/source/common/ucnv_u16.cpp',
+   '/intl/icu/source/common/ucnv_u32.cpp',
+   '/intl/icu/source/common/ucnv_u7.cpp',
+   '/intl/icu/source/common/ucnv_u8.cpp',
    '/intl/icu/source/common/ucnvbocu.cpp',
-   '/intl/icu/source/common/ucnvdisp.c',
-   '/intl/icu/source/common/ucnvhz.c',
-   '/intl/icu/source/common/ucnvisci.c',
-   '/intl/icu/source/common/ucnvlat1.c',
+   '/intl/icu/source/common/ucnvdisp.cpp',
+   '/intl/icu/source/common/ucnvhz.cpp',
+   '/intl/icu/source/common/ucnvisci.cpp',
+   '/intl/icu/source/common/ucnvlat1.cpp',
    '/intl/icu/source/common/ucnvmbcs.cpp',
-   '/intl/icu/source/common/ucnvscsu.c',
+   '/intl/icu/source/common/ucnvscsu.cpp',
    '/intl/icu/source/common/ucnvsel.cpp',
    '/intl/icu/source/common/ucol_swp.cpp',
+   '/intl/icu/source/common/ucptrie.cpp',
    '/intl/icu/source/common/ucurr.cpp',
    '/intl/icu/source/common/udata.cpp',
-   '/intl/icu/source/common/udatamem.c',
-   '/intl/icu/source/common/udataswp.c',
-   '/intl/icu/source/common/uenum.c',
-   '/intl/icu/source/common/uhash.c',
+   '/intl/icu/source/common/udatamem.cpp',
+   '/intl/icu/source/common/udataswp.cpp',
+   '/intl/icu/source/common/uenum.cpp',
+   '/intl/icu/source/common/uhash.cpp',
    '/intl/icu/source/common/uhash_us.cpp',
    '/intl/icu/source/common/uidna.cpp',
    '/intl/icu/source/common/uinit.cpp',
-   '/intl/icu/source/common/uinvchar.c',
+   '/intl/icu/source/common/uinvchar.cpp',
    '/intl/icu/source/common/uiter.cpp',
-   '/intl/icu/source/common/ulist.c',
-   '/intl/icu/source/common/ulistformatter.cpp',
+   '/intl/icu/source/common/ulist.cpp',
    '/intl/icu/source/common/uloc.cpp',
    '/intl/icu/source/common/uloc_keytype.cpp',
-   '/intl/icu/source/common/uloc_tag.c',
-   '/intl/icu/source/common/umapfile.c',
-   '/intl/icu/source/common/umath.c',
+   '/intl/icu/source/common/uloc_tag.cpp',
+   '/intl/icu/source/common/umapfile.cpp',
+   '/intl/icu/source/common/umath.cpp',
+   '/intl/icu/source/common/umutablecptrie.cpp',
    '/intl/icu/source/common/umutex.cpp',
    '/intl/icu/source/common/unames.cpp',
    '/intl/icu/source/common/unifiedcache.cpp',
@@ -148,11 +153,11 @@ SOURCES += [
    '/intl/icu/source/common/unormcmp.cpp',
    '/intl/icu/source/common/uobject.cpp',
    '/intl/icu/source/common/uprops.cpp',
-   '/intl/icu/source/common/ures_cnv.c',
+   '/intl/icu/source/common/ures_cnv.cpp',
    '/intl/icu/source/common/uresbund.cpp',
    '/intl/icu/source/common/uresdata.cpp',
-   '/intl/icu/source/common/usc_impl.c',
-   '/intl/icu/source/common/uscript.c',
+   '/intl/icu/source/common/usc_impl.cpp',
+   '/intl/icu/source/common/uscript.cpp',
    '/intl/icu/source/common/uscript_props.cpp',
    '/intl/icu/source/common/uset.cpp',
    '/intl/icu/source/common/uset_props.cpp',
@@ -166,23 +171,24 @@ SOURCES += [
    '/intl/icu/source/common/ustrcase.cpp',
    '/intl/icu/source/common/ustrcase_locale.cpp',
    '/intl/icu/source/common/ustrenum.cpp',
-   '/intl/icu/source/common/ustrfmt.c',
+   '/intl/icu/source/common/ustrfmt.cpp',
    '/intl/icu/source/common/ustring.cpp',
    '/intl/icu/source/common/ustrtrns.cpp',
    '/intl/icu/source/common/utext.cpp',
-   '/intl/icu/source/common/utf_impl.c',
+   '/intl/icu/source/common/utf_impl.cpp',
    '/intl/icu/source/common/util.cpp',
    '/intl/icu/source/common/util_props.cpp',
-   '/intl/icu/source/common/utrace.c',
+   '/intl/icu/source/common/utrace.cpp',
    '/intl/icu/source/common/utrie.cpp',
    '/intl/icu/source/common/utrie2.cpp',
    '/intl/icu/source/common/utrie2_builder.cpp',
+   '/intl/icu/source/common/utrie_swap.cpp',
    '/intl/icu/source/common/uts46.cpp',
-   '/intl/icu/source/common/utypes.c',
+   '/intl/icu/source/common/utypes.cpp',
    '/intl/icu/source/common/uvector.cpp',
    '/intl/icu/source/common/uvectr32.cpp',
    '/intl/icu/source/common/uvectr64.cpp',
-   '/intl/icu/source/common/wintz.c',
+   '/intl/icu/source/common/wintz.cpp',
 ]
 
 EXPORTS.unicode += [
@@ -192,17 +198,19 @@ EXPORTS.unicode += [
    '/intl/icu/source/common/unicode/bytestrie.h',
    '/intl/icu/source/common/unicode/bytestriebuilder.h',
    '/intl/icu/source/common/unicode/caniter.h',
+   '/intl/icu/source/common/unicode/casemap.h',
+   '/intl/icu/source/common/unicode/char16ptr.h',
    '/intl/icu/source/common/unicode/chariter.h',
    '/intl/icu/source/common/unicode/dbbi.h',
    '/intl/icu/source/common/unicode/docmain.h',
    '/intl/icu/source/common/unicode/dtintrv.h',
+   '/intl/icu/source/common/unicode/edits.h',
    '/intl/icu/source/common/unicode/enumset.h',
    '/intl/icu/source/common/unicode/errorcode.h',
    '/intl/icu/source/common/unicode/filteredbrk.h',
    '/intl/icu/source/common/unicode/icudataver.h',
    '/intl/icu/source/common/unicode/icuplug.h',
    '/intl/icu/source/common/unicode/idna.h',
-   '/intl/icu/source/common/unicode/listformatter.h',
    '/intl/icu/source/common/unicode/localpointer.h',
    '/intl/icu/source/common/unicode/locdspnm.h',
    '/intl/icu/source/common/unicode/locid.h',
@@ -221,6 +229,7 @@ EXPORTS.unicode += [
    '/intl/icu/source/common/unicode/simpleformatter.h',
    '/intl/icu/source/common/unicode/std_string.h',
    '/intl/icu/source/common/unicode/strenum.h',
+   '/intl/icu/source/common/unicode/stringoptions.h',
    '/intl/icu/source/common/unicode/stringpiece.h',
    '/intl/icu/source/common/unicode/stringtriebuilder.h',
    '/intl/icu/source/common/unicode/symtable.h',
@@ -239,6 +248,8 @@ EXPORTS.unicode += [
    '/intl/icu/source/common/unicode/ucnv_err.h',
    '/intl/icu/source/common/unicode/ucnvsel.h',
    '/intl/icu/source/common/unicode/uconfig.h',
+   '/intl/icu/source/common/unicode/ucpmap.h',
+   '/intl/icu/source/common/unicode/ucptrie.h',
    '/intl/icu/source/common/unicode/ucurr.h',
    '/intl/icu/source/common/unicode/udata.h',
    '/intl/icu/source/common/unicode/udisplaycontext.h',
@@ -246,10 +257,10 @@ EXPORTS.unicode += [
    '/intl/icu/source/common/unicode/uidna.h',
    '/intl/icu/source/common/unicode/uiter.h',
    '/intl/icu/source/common/unicode/uldnames.h',
-   '/intl/icu/source/common/unicode/ulistformatter.h',
    '/intl/icu/source/common/unicode/uloc.h',
    '/intl/icu/source/common/unicode/umachine.h',
    '/intl/icu/source/common/unicode/umisc.h',
+   '/intl/icu/source/common/unicode/umutablecptrie.h',
    '/intl/icu/source/common/unicode/unifilt.h',
    '/intl/icu/source/common/unicode/unifunct.h',
    '/intl/icu/source/common/unicode/unimatch.h',

config/external/icu/defs.mozbuild

@@ -14,7 +14,6 @@ DEFINES.update(
     UCONFIG_NO_LEGACY_CONVERSION = True,
     UCONFIG_NO_TRANSLITERATION = True,
     UCONFIG_NO_REGULAR_EXPRESSIONS = True,
-    UCONFIG_NO_BREAK_ITERATION = True,
 
     # We don't need to pass data to and from legacy char* APIs.
     U_CHARSET_IS_UTF8 = True,

config/external/icu/i18n/sources.mozbuild

@@ -1,6 +1,5 @@
 # THIS FILE IS GENERATED BY /intl/icu_sources_data.py DO NOT EDIT
 SOURCES += [
-   '/intl/icu/source/i18n/affixpatternparser.cpp',
    '/intl/icu/source/i18n/alphaindex.cpp',
    '/intl/icu/source/i18n/anytrans.cpp',
    '/intl/icu/source/i18n/astro.cpp',
@@ -53,23 +52,22 @@ SOURCES += [
    '/intl/icu/source/i18n/datefmt.cpp',
    '/intl/icu/source/i18n/dayperiodrules.cpp',
    '/intl/icu/source/i18n/dcfmtsym.cpp',
-   '/intl/icu/source/i18n/decContext.c',
-   '/intl/icu/source/i18n/decfmtst.cpp',
-   '/intl/icu/source/i18n/decimalformatpattern.cpp',
+   '/intl/icu/source/i18n/decContext.cpp',
    '/intl/icu/source/i18n/decimfmt.cpp',
-   '/intl/icu/source/i18n/decimfmtimpl.cpp',
-   '/intl/icu/source/i18n/decNumber.c',
-   '/intl/icu/source/i18n/digitaffix.cpp',
-   '/intl/icu/source/i18n/digitaffixesandpadding.cpp',
-   '/intl/icu/source/i18n/digitformatter.cpp',
-   '/intl/icu/source/i18n/digitgrouping.cpp',
-   '/intl/icu/source/i18n/digitinterval.cpp',
-   '/intl/icu/source/i18n/digitlst.cpp',
+   '/intl/icu/source/i18n/decNumber.cpp',
+   '/intl/icu/source/i18n/double-conversion-bignum-dtoa.cpp',
+   '/intl/icu/source/i18n/double-conversion-bignum.cpp',
+   '/intl/icu/source/i18n/double-conversion-cached-powers.cpp',
+   '/intl/icu/source/i18n/double-conversion-diy-fp.cpp',
+   '/intl/icu/source/i18n/double-conversion-fast-dtoa.cpp',
+   '/intl/icu/source/i18n/double-conversion-strtod.cpp',
+   '/intl/icu/source/i18n/double-conversion.cpp',
    '/intl/icu/source/i18n/dtfmtsym.cpp',
    '/intl/icu/source/i18n/dtitvfmt.cpp',
    '/intl/icu/source/i18n/dtitvinf.cpp',
    '/intl/icu/source/i18n/dtptngen.cpp',
    '/intl/icu/source/i18n/dtrule.cpp',
+   '/intl/icu/source/i18n/erarules.cpp',
    '/intl/icu/source/i18n/esctrn.cpp',
    '/intl/icu/source/i18n/ethpccal.cpp',
    '/intl/icu/source/i18n/fmtable.cpp',
@@ -86,6 +84,7 @@ SOURCES += [
    '/intl/icu/source/i18n/inputext.cpp',
    '/intl/icu/source/i18n/islamcal.cpp',
    '/intl/icu/source/i18n/japancal.cpp',
+   '/intl/icu/source/i18n/listformatter.cpp',
    '/intl/icu/source/i18n/measfmt.cpp',
    '/intl/icu/source/i18n/measunit.cpp',
    '/intl/icu/source/i18n/measure.cpp',
@@ -95,15 +94,50 @@ SOURCES += [
    '/intl/icu/source/i18n/nfrule.cpp',
    '/intl/icu/source/i18n/nfsubs.cpp',
    '/intl/icu/source/i18n/nortrans.cpp',
+   '/intl/icu/source/i18n/nounit.cpp',
    '/intl/icu/source/i18n/nultrans.cpp',
+   '/intl/icu/source/i18n/number_affixutils.cpp',
+   '/intl/icu/source/i18n/number_asformat.cpp',
+   '/intl/icu/source/i18n/number_capi.cpp',
+   '/intl/icu/source/i18n/number_compact.cpp',
+   '/intl/icu/source/i18n/number_currencysymbols.cpp',
+   '/intl/icu/source/i18n/number_decimalquantity.cpp',
+   '/intl/icu/source/i18n/number_decimfmtprops.cpp',
+   '/intl/icu/source/i18n/number_fluent.cpp',
+   '/intl/icu/source/i18n/number_formatimpl.cpp',
+   '/intl/icu/source/i18n/number_grouping.cpp',
+   '/intl/icu/source/i18n/number_integerwidth.cpp',
+   '/intl/icu/source/i18n/number_longnames.cpp',
+   '/intl/icu/source/i18n/number_mapper.cpp',
+   '/intl/icu/source/i18n/number_modifiers.cpp',
+   '/intl/icu/source/i18n/number_multiplier.cpp',
+   '/intl/icu/source/i18n/number_notation.cpp',
+   '/intl/icu/source/i18n/number_padding.cpp',
+   '/intl/icu/source/i18n/number_patternmodifier.cpp',
+   '/intl/icu/source/i18n/number_patternstring.cpp',
+   '/intl/icu/source/i18n/number_rounding.cpp',
+   '/intl/icu/source/i18n/number_scientific.cpp',
+   '/intl/icu/source/i18n/number_skeletons.cpp',
+   '/intl/icu/source/i18n/number_stringbuilder.cpp',
+   '/intl/icu/source/i18n/number_utils.cpp',
    '/intl/icu/source/i18n/numfmt.cpp',
+   '/intl/icu/source/i18n/numparse_affixes.cpp',
+   '/intl/icu/source/i18n/numparse_compositions.cpp',
+   '/intl/icu/source/i18n/numparse_currency.cpp',
+   '/intl/icu/source/i18n/numparse_decimal.cpp',
+   '/intl/icu/source/i18n/numparse_impl.cpp',
+   '/intl/icu/source/i18n/numparse_parsednumber.cpp',
+   '/intl/icu/source/i18n/numparse_scientific.cpp',
+   '/intl/icu/source/i18n/numparse_stringsegment.cpp',
+   '/intl/icu/source/i18n/numparse_symbols.cpp',
+   '/intl/icu/source/i18n/numparse_validators.cpp',
+   '/intl/icu/source/i18n/numrange_fluent.cpp',
+   '/intl/icu/source/i18n/numrange_impl.cpp',
    '/intl/icu/source/i18n/numsys.cpp',
    '/intl/icu/source/i18n/olsontz.cpp',
    '/intl/icu/source/i18n/persncal.cpp',
-   '/intl/icu/source/i18n/pluralaffix.cpp',
    '/intl/icu/source/i18n/plurfmt.cpp',
    '/intl/icu/source/i18n/plurrule.cpp',
-   '/intl/icu/source/i18n/precision.cpp',
    '/intl/icu/source/i18n/quant.cpp',
    '/intl/icu/source/i18n/quantityformatter.cpp',
    '/intl/icu/source/i18n/rbnf.cpp',
@@ -130,7 +164,6 @@ SOURCES += [
    '/intl/icu/source/i18n/selfmt.cpp',
    '/intl/icu/source/i18n/sharedbreakiterator.cpp',
    '/intl/icu/source/i18n/simpletz.cpp',
-   '/intl/icu/source/i18n/smallintformatter.cpp',
    '/intl/icu/source/i18n/smpdtfmt.cpp',
    '/intl/icu/source/i18n/smpdtfst.cpp',
    '/intl/icu/source/i18n/sortkey.cpp',
@@ -167,7 +200,8 @@ SOURCES += [
    '/intl/icu/source/i18n/udatpg.cpp',
    '/intl/icu/source/i18n/ufieldpositer.cpp',
    '/intl/icu/source/i18n/uitercollationiterator.cpp',
-   '/intl/icu/source/i18n/ulocdata.c',
+   '/intl/icu/source/i18n/ulistformatter.cpp',
+   '/intl/icu/source/i18n/ulocdata.cpp',
    '/intl/icu/source/i18n/umsg.cpp',
    '/intl/icu/source/i18n/unesctrn.cpp',
    '/intl/icu/source/i18n/uni2name.cpp',
@@ -184,10 +218,8 @@ SOURCES += [
    '/intl/icu/source/i18n/uspoof_impl.cpp',
    '/intl/icu/source/i18n/utf16collationiterator.cpp',
    '/intl/icu/source/i18n/utf8collationiterator.cpp',
-   '/intl/icu/source/i18n/utmscale.c',
+   '/intl/icu/source/i18n/utmscale.cpp',
    '/intl/icu/source/i18n/utrans.cpp',
-   '/intl/icu/source/i18n/valueformatter.cpp',
-   '/intl/icu/source/i18n/visibledigits.cpp',
    '/intl/icu/source/i18n/vtzone.cpp',
    '/intl/icu/source/i18n/vzone.cpp',
    '/intl/icu/source/i18n/windtfmt.cpp',
@@ -223,10 +255,14 @@ EXPORTS.unicode += [
    '/intl/icu/source/i18n/unicode/fpositer.h',
    '/intl/icu/source/i18n/unicode/gender.h',
    '/intl/icu/source/i18n/unicode/gregocal.h',
+   '/intl/icu/source/i18n/unicode/listformatter.h',
    '/intl/icu/source/i18n/unicode/measfmt.h',
    '/intl/icu/source/i18n/unicode/measunit.h',
    '/intl/icu/source/i18n/unicode/measure.h',
    '/intl/icu/source/i18n/unicode/msgfmt.h',
+   '/intl/icu/source/i18n/unicode/nounit.h',
+   '/intl/icu/source/i18n/unicode/numberformatter.h',
+   '/intl/icu/source/i18n/unicode/numberrangeformatter.h',
    '/intl/icu/source/i18n/unicode/numfmt.h',
    '/intl/icu/source/i18n/unicode/numsys.h',
    '/intl/icu/source/i18n/unicode/plurfmt.h',
@@ -263,10 +299,12 @@ EXPORTS.unicode += [
    '/intl/icu/source/i18n/unicode/ufieldpositer.h',
    '/intl/icu/source/i18n/unicode/uformattable.h',
    '/intl/icu/source/i18n/unicode/ugender.h',
+   '/intl/icu/source/i18n/unicode/ulistformatter.h',
    '/intl/icu/source/i18n/unicode/ulocdata.h',
    '/intl/icu/source/i18n/unicode/umsg.h',
    '/intl/icu/source/i18n/unicode/unirepl.h',
    '/intl/icu/source/i18n/unicode/unum.h',
+   '/intl/icu/source/i18n/unicode/unumberformatter.h',
    '/intl/icu/source/i18n/unicode/unumsys.h',
    '/intl/icu/source/i18n/unicode/upluralrules.h',
    '/intl/icu/source/i18n/unicode/uregex.h',

config/external/icu/moz.build

@@ -3,8 +3,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-Library('icu')
-
 DIRS += [
     'common',
     'data',
@@ -14,5 +12,14 @@ DIRS += [
 if CONFIG['MOZ_ICU_DATA_ARCHIVE']:
     DIRS += ['stubdata']
     USE_LIBS += ['icustubdata']
+    Library('icu')
 else:
     USE_LIBS += ['icudata']
+    SharedLibrary('icu')
+    SHARED_LIBRARY_NAME = 'icu' + CONFIG['MOZ_ICU_VERSION']
+    # Linking ICU gets too spammy in warnings with MSVC
+    if CONFIG['_MSC_VER'] and not CONFIG['CLANG_CL']:
+        LDFLAGS += [
+            '/IGNORE:4217', # symbol defined in $1.obj is defined in $2.obj
+            '/IGNORE:4286', # similar with LNK4217
+        ]

config/external/icu/stubdata/moz.build

@@ -9,4 +9,4 @@
 
 Library('icustubdata')
 
-SOURCES += ['/intl/icu/source/stubdata/stubdata.c']
+SOURCES += ['/intl/icu/source/stubdata/stubdata.cpp']

config/external/moz.build

@@ -41,6 +41,9 @@ if CONFIG['CPU_ARCH'] == 'arm':
 if CONFIG['MOZ_FFVPX']:
     external_dirs += ['media/ffvpx']
 
+if CONFIG["MOZ_JXL"]:
+    external_dirs += ["media/libjxl", "media/highway"]
+
 external_dirs += [
     'media/kiss_fft',
     'media/libcubeb',

config/faster/rules.mk

@@ -10,13 +10,12 @@
 # things happening at each step required other things happening in previous
 # steps without any documentation of those dependencies.
 #
-# This new build system tries to start afresh by establishing what files or
-# operations are needed for the build, and applying the necessary rules to
-# have those in place, relying on make dependencies to get them going.
+# This build system establishes what files or operations are needed for the
+# build, and applying the necessary rules to have those in place, relying on
+# make dependencies to get them going.
 #
-# As of writing, only building non-compiled parts of Firefox is supported
-# here (a few other things are also left out). This is a starting point, with
-# the intent to grow this build system to make it more complete.
+# Only non-compiled parts of the application and platform are built and
+# supported here (a few other things are also left out).
 #
 # This file contains rules and dependencies to get things working. The intent
 # is for a Makefile to define some dependencies and variables, and include
@@ -42,19 +41,11 @@ ifndef NO_XPIDL
 default: $(TOPOBJDIR)/config/makefiles/xpidl/xpidl
 endif
 
-# Mac builds require to copy things in dist/bin/*.app
-# TODO: remove the MOZ_WIDGET_TOOLKIT and MOZ_BUILD_APP variables from
-# faster/Makefile and python/mozbuild/mozbuild/test/backend/test_build.py
-# when this is not required anymore.
-# We however don't need to do this when using the hybrid
-# FasterMake/RecursiveMake backend (FASTER_RECURSIVE_MAKE is set when
-# recursing from the RecursiveMake backend)
-ifndef FASTER_RECURSIVE_MAKE
+# Mac builds require copying files in dist/bin/*.app
 ifeq (cocoa,$(MOZ_WIDGET_TOOLKIT))
 default:
 	$(MAKE) -C $(TOPOBJDIR)/$(MOZ_BUILD_APP)/app repackage
 endif
-endif
 
 .PHONY: FORCE
 
@@ -99,12 +90,9 @@ $(addprefix install-,$(INSTALL_MANIFESTS)): install-%: $(addprefix $(TOPOBJDIR)/
 # that are not supported by data in moz.build.
 
 # The xpidl target in config/makefiles/xpidl requires the install manifest for
-# dist/idl to have been processed. When using the hybrid
-# FasterMake/RecursiveMake backend, this dependency is handled in the top-level
-# Makefile.
-ifndef FASTER_RECURSIVE_MAKE
+# dist/idl to have been processed.
 $(TOPOBJDIR)/config/makefiles/xpidl/xpidl: $(TOPOBJDIR)/install-dist_idl
-endif
+
 # It also requires all the install manifests for dist/bin to have been processed
 # because it adds interfaces.manifest references with buildlist.py.
 $(TOPOBJDIR)/config/makefiles/xpidl/xpidl: $(addprefix install-,$(filter dist/bin%,$(INSTALL_MANIFESTS)))

config/milestone.txt

@@ -8,4 +8,4 @@
 # Referenced by milestone.py.
 #--------------------------------------------------------
 
-5.1.0+
+6.1.0

config/msvc-stl-wrapper.template.h

@@ -19,12 +19,6 @@
 #  define MOZ_INCLUDE_MOZALLOC_H_FROM_${HEADER}
 #endif
 
-// Code built with !_HAS_EXCEPTIONS calls std::_Throw(), but the win2k
-// CRT doesn't export std::_Throw().  So we define it.
-#ifndef mozilla_Throw_h
-#  include "mozilla/throw_msvc.h"
-#endif
-
 #ifdef _DEBUG
 // From
 //   http://msdn.microsoft.com/en-us/library/aa985982%28VS.80%29.aspx

config/system-headers

@@ -810,6 +810,7 @@ sym.h
 synch.h
 syncmgr.h
 sys/atomic_op.h
+sys/auxv.h
 sys/bitypes.h
 sys/byteorder.h
 syscall.h

devtools/client/framework/toolbox-window.xul

@@ -26,16 +26,19 @@
          key="&closeCmd.key;"
          command="toolbox-cmd-close"
          modifiers="accel"/>
-    <key id="toolbox-key-toggle"
-         key="&toggleToolbox.key;"
-         command="toolbox-cmd-close"
-         modifiers="accel,shift"
-         disabled="true"/>
+#ifdef XP_MACOSX
     <key id="toolbox-key-toggle-osx"
          key="&toggleToolbox.key;"
          command="toolbox-cmd-close"
          modifiers="accel,alt"
          disabled="true"/>
+#else
+    <key id="toolbox-key-toggle"
+         key="&toggleToolbox.key;"
+         command="toolbox-cmd-close"
+         modifiers="accel,shift"
+         disabled="true"/>
+#endif
     <key id="toolbox-key-toggle-F12"
          keycode="&toggleToolboxF12.keycode;"
          keytext="&toggleToolboxF12.keytext;"

devtools/client/inspector/markup/test/doc_markup_anonymous.html

@@ -25,10 +25,8 @@
   <script>
   "use strict";
   var host = document.querySelector("#shadow");
-  if (host.createShadowRoot) {
-    var root = host.createShadowRoot();
-    root.innerHTML = "<h3>Shadow DOM</h3><select multiple></select>";
-  }
+  var root = host.attachShadow({ mode: "open" });
+  root.innerHTML = "<h3>Shadow DOM</h3><select multiple></select>";
   </script>
 </body>
 </html>

devtools/client/jar.mn

@@ -104,7 +104,7 @@ devtools.jar:
     content/commandline/commandline.css (commandline/commandline.css)
     content/commandline/commandlineoutput.xhtml (commandline/commandlineoutput.xhtml)
     content/commandline/commandlinetooltip.xhtml (commandline/commandlinetooltip.xhtml)
-    content/framework/toolbox-window.xul (framework/toolbox-window.xul)
+*   content/framework/toolbox-window.xul (framework/toolbox-window.xul)
     content/framework/toolbox-options.xhtml (framework/toolbox-options.xhtml)
     content/framework/toolbox.xul (framework/toolbox.xul)
     content/framework/toolbox-init.js (framework/toolbox-init.js)

devtools/client/shared/components/tabs/tabs.css

@@ -46,7 +46,7 @@
 .tabs .all-tabs-menu  {
   position: absolute;
   top: 0;
-  offset-inline-end: 0;
+  inset-inline-end: 0;
   width: 15px;
   height: 100%;
   border-inline-start: 1px solid var(--theme-splitter-color);

devtools/client/shared/curl.js

@@ -8,7 +8,7 @@
  * Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2009 Mozilla Foundation. All rights reserved.
- * Copyright (C) 2022 Moonchild Productions. All rights reserved.
+ * Copyright (C) 2022, 2023 Moonchild Productions. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -138,7 +138,8 @@ const Curl = {
     for (let i = 0; i < headers.length; i++) {
       let header = headers[i];
       if (header.name.toLowerCase() === "accept-encoding") {
-        addParam("--compressed");
+        // Ignore transfer encoding (compression) as not all commonly installed
+        // versions of curl support this.
         continue;
       }
       if (ignoredHeaders.has(header.name.toLowerCase())) {
@@ -397,41 +398,55 @@ const CurlUtils = {
 
   /**
    * Escape util function for Windows systems.
-   * Credit: Google DevTools
    */
   escapeStringWin: function (str) {
     /* 
-       Replace the backtick character ` with `` in order to escape it.
-       The backtick character is an escape character in PowerShell and
-       can, among other things, be used to disable the effect of some
-       of the other escapes created below.
+       Because the cmd.exe parser and the MS Crt arguments parsers use some
+       of the same escape characters, they can interact with each other in
+       terrible ways, meaning the order of operations is critical here.
 
-       Replace dollar sign because of commands in powershell when using
-       double quotes. e.g $(calc.exe).
+       1. Replace \ with \\ first, because it is an escape character for
+       certain conditions in both parsers.
+
+       2. Replace double quote chars with two double quotes (not by escaping
+       with \") because it is recognized by both the cmd.exe and MS Crt
+       arguments parsers.
        
-       Also see http://www.rlmueller.net/PowerShellEscape.htm for details.
+       3. Escape ` and $ so commands do not get executed, e.g $(calc.exe) or
+       `\$(calc.exe)
+       
+       4. Escape all characters we are not sure about with ^, to ensure it
+       gets to the MS Crt arguments parser safely.
 
-       Replace quote by double quote (but not by \") because it is
-       recognized by both cmd.exe and MS Crt arguments parser.
+       5. The % character is special because the MS Crt arguments parser will
+       try and look for environment variables and fill them in, in-place. We
+       cannot escape them with % and cannot escape them with ^ (because it's
+       cmd.exe's escape, not the MS Crt arguments parser). So, we can get the
+       cmd.exe parser to escape the character after it, if it is followed by
+       a valid starting character of an environment variable.
+       This ensures we do not try and double-escape another ^ if it was placed
+       by the previous replace.
 
-       Replace % by "%" because it could be expanded to an environment
-       variable value. So %% becomes "%""%". Even if an env variable ""
-       (2 doublequotes) is declared, the cmd.exe will not
-       substitute it with its value.
+       6. We replace \r and \r\n with \n; this allows us to consistently
+       escape all new lines in the next replace.
 
-       Replace each backslash with double backslash to make sure
-       MS Crt arguments parser won't collapse them.
-
-       Replace new line outside of quotes since cmd.exe doesn't let
-       us do it inside.
+       7. Lastly, we replace new lines with ^ and TWO new lines, because the
+       first new line is there to enact the escape command, and the second is
+       the character to escape (in this case new line).
+       The extra " enables escaping new lines with ^ within quotes in cmd.exe.
     */
-    return "\"" + 
-      str.replaceAll("`", "``")
-         .replaceAll("$", "`$")
-         .replaceAll('"', '""')
-         .replaceAll("%", '"%"')
-         .replace(/\\/g, "\\\\")
-         .replace(/[\r\n]+/g, "\"^$&\"") + "\"";
+    const encapsChars = '"';
+    return (
+      encapsChars +
+      str
+        .replace(/\\/g, "\\\\")
+        .replace(/"/g, '""')
+        .replace(/[`$]/g, "\\$&")
+        .replace(/[^a-zA-Z0-9\s_\-:=+~\/.',?;()*\$&\\{}\"`]/g, "^$&")
+        .replace(/%(?=[a-zA-Z0-9_])/g, "%^")
+        .replace(/\r\n?/g, "\n")
+        .replace(/\n/g, '"^\r\n\r\n"')
+      + encapsChars);
   }
 };
 

devtools/client/shared/developer-toolbar.js

@@ -1032,7 +1032,7 @@ OutputPanel.prototype._resize = function () {
       break;
   }
 
-  this.document.body.style.width = "-moz-max-content";
+  this.document.body.style.width = "max-content";
   let style = this._frame.contentWindow.getComputedStyle(this.document.body);
   let frameWidth = parseInt(style.width, 10);
   let width = Math.min(maxWidth, frameWidth);

devtools/client/themes/common.css

@@ -652,7 +652,7 @@ checkbox:-moz-focusring {
 .devtools-searchinput-clear {
   position: absolute;
   top: 3.5px;
-  offset-inline-end: 7px;
+  inset-inline-end: 7px;
   padding: 0;
   border: 0;
   width: 16px;

devtools/client/themes/widgets.css

@@ -216,7 +216,7 @@
   content: "";
   position: absolute;
   top: 1px;
-  offset-inline-start: 0;
+  inset-inline-start: 0;
   width: 12px;
   height: 22px;
   background-repeat: no-repeat;

devtools/server/actors/highlighters.css

@@ -521,8 +521,8 @@
   width: 16px;
   height: 16px;
   position: absolute;
-  offset-inline-start: 3px;
-  offset-block-start: 3px;
+  inset-inline-start: 3px;
+  inset-block-start: 3px;
   box-shadow: 0px 0px 0px black;
   border: solid 1px #fff;
 }

devtools/server/tests/mochitest/inspector-traversal-data.html

@@ -21,8 +21,8 @@
 
       // Set up a basic shadow DOM
       var host = document.querySelector('#shadow');
-      if (host.createShadowRoot) {
-        var root = host.createShadowRoot();
+      if (host.attachShadow) {
+        let root = host.attachShadow({ mode: "open" });
         root.innerHTML = '<h3>Shadow <em>DOM</em></h3><select multiple></select>';
       }
 

devtools/shared/css/generated/properties-db.js

@@ -2209,13 +2209,13 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "content",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },
@@ -2232,13 +2232,13 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "content",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },
@@ -3144,10 +3144,10 @@ exports.CSS_PROPERTIES = {
       "mix-blend-mode",
       "object-fit",
       "object-position",
-      "offset-block-end",
-      "offset-block-start",
-      "offset-inline-end",
-      "offset-inline-start",
+      "inset-block-end",
+      "inset-block-start",
+      "inset-inline-end",
+      "inset-inline-start",
       "opacity",
       "order",
       "-moz-orient",
@@ -3304,9 +3304,7 @@ exports.CSS_PROPERTIES = {
       "-moz-mac-source-list-selection",
       "-moz-mac-vibrancy-dark",
       "-moz-mac-vibrancy-light",
-      "-moz-max-content",
       "-moz-middle-with-baseline",
-      "-moz-min-content",
       "-moz-none",
       "-moz-popup",
       "-moz-pre-space",
@@ -3362,6 +3360,7 @@ exports.CSS_PROPERTIES = {
       "bottom",
       "bottom-outside",
       "break-all",
+      "break-spaces",
       "break-word",
       "butt",
       "button",
@@ -3493,6 +3492,7 @@ exports.CSS_PROPERTIES = {
       "margin-box",
       "match-source",
       "mathematical",
+      "max-content",
       "medium",
       "menuarrow",
       "menubar",
@@ -3510,6 +3510,7 @@ exports.CSS_PROPERTIES = {
       "meterbar",
       "meterchunk",
       "middle",
+      "min-content",
       "miter",
       "mixed",
       "multiply",
@@ -6000,13 +6001,13 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "content",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },
@@ -6023,13 +6024,13 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "content",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },
@@ -6816,12 +6817,12 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },
@@ -6903,8 +6904,101 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
+      "auto",
+      "calc",
+      "inherit",
+      "initial",
+      "max-content",
+      "min-content",
+      "unset"
+    ]
+  },
+  "inset": {
+    "isInherited": false,
+    "subproperties": [
+      "top",
+      "right",
+      "bottom",
+      "left"
+    ],
+    "supports": [
+      6,
+      8
+    ],
+    "values": [
+      "-moz-calc",
+      "auto",
+      "calc",
+      "inherit",
+      "initial",
+      "unset"
+    ]
+  },
+  "inset-block-end": {
+    "isInherited": false,
+    "subproperties": [
+      "inset-block-end"
+    ],
+    "supports": [
+      6,
+      8
+    ],
+    "values": [
+      "-moz-calc",
+      "auto",
+      "calc",
+      "inherit",
+      "initial",
+      "unset"
+    ]
+  },
+  "inset-block-start": {
+    "isInherited": false,
+    "subproperties": [
+      "inset-block-start"
+    ],
+    "supports": [
+      6,
+      8
+    ],
+    "values": [
+      "-moz-calc",
+      "auto",
+      "calc",
+      "inherit",
+      "initial",
+      "unset"
+    ]
+  },
+  "inset-inline-end": {
+    "isInherited": false,
+    "subproperties": [
+      "inset-inline-end"
+    ],
+    "supports": [
+      6,
+      8
+    ],
+    "values": [
+      "-moz-calc",
+      "auto",
+      "calc",
+      "inherit",
+      "initial",
+      "unset"
+    ]
+  },
+  "inset-inline-start": {
+    "isInherited": false,
+    "subproperties": [
+      "inset-inline-start"
+    ],
+    "supports": [
+      6,
+      8
+    ],
+    "values": [
+      "-moz-calc",
       "auto",
       "calc",
       "inherit",
@@ -7651,11 +7745,11 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "calc",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "none",
       "unset"
     ]
@@ -7673,11 +7767,11 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "calc",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "none",
       "unset"
     ]
@@ -7695,11 +7789,11 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "calc",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "none",
       "unset"
     ]
@@ -7735,12 +7829,12 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },
@@ -7757,12 +7851,12 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },
@@ -7779,12 +7873,12 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },
@@ -7851,7 +7945,7 @@ exports.CSS_PROPERTIES = {
   "offset-block-end": {
     "isInherited": false,
     "subproperties": [
-      "offset-block-end"
+      "inset-block-end"
     ],
     "supports": [
       6,
@@ -7869,7 +7963,7 @@ exports.CSS_PROPERTIES = {
   "offset-block-start": {
     "isInherited": false,
     "subproperties": [
-      "offset-block-start"
+      "inset-block-start"
     ],
     "supports": [
       6,
@@ -7887,7 +7981,7 @@ exports.CSS_PROPERTIES = {
   "offset-inline-end": {
     "isInherited": false,
     "subproperties": [
-      "offset-inline-end"
+      "inset-inline-end"
     ],
     "supports": [
       6,
@@ -7905,7 +7999,7 @@ exports.CSS_PROPERTIES = {
   "offset-inline-start": {
     "isInherited": false,
     "subproperties": [
-      "offset-inline-start"
+      "inset-inline-start"
     ],
     "supports": [
       6,
@@ -9519,6 +9613,7 @@ exports.CSS_PROPERTIES = {
     "supports": [],
     "values": [
       "-moz-pre-space",
+      "break-spaces",
       "inherit",
       "initial",
       "normal",
@@ -9542,12 +9637,12 @@ exports.CSS_PROPERTIES = {
       "-moz-available",
       "-moz-calc",
       "-moz-fit-content",
-      "-moz-max-content",
-      "-moz-min-content",
       "auto",
       "calc",
       "inherit",
       "initial",
+      "max-content",
+      "min-content",
       "unset"
     ]
   },

docshell/base/LoadContext.cpp

@@ -190,23 +190,6 @@ LoadContext::GetOriginAttributes(JS::MutableHandleValue aAttrs)
   return NS_OK;
 }
 
-NS_IMETHODIMP
-LoadContext::IsTrackingProtectionOn(bool* aIsTrackingProtectionOn)
-{
-  MOZ_ASSERT(mIsNotNull);
-
-  if (Preferences::GetBool("privacy.trackingprotection.enabled", false)) {
-    *aIsTrackingProtectionOn = true;
-  } else if ((mOriginAttributes.mPrivateBrowsingId > 0) &&
-             Preferences::GetBool("privacy.trackingprotection.pbmode.enabled", false)) {
-    *aIsTrackingProtectionOn = true;
-  } else {
-    *aIsTrackingProtectionOn = false;
-  }
-
-  return NS_OK;
-}
-
 //-----------------------------------------------------------------------------
 // LoadContext::nsIInterfaceRequestor
 //-----------------------------------------------------------------------------

docshell/base/nsDocShell.cpp

@@ -13651,21 +13651,6 @@ nsDocShell::GetNestedFrameId(uint64_t* aId)
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsDocShell::IsTrackingProtectionOn(bool* aIsTrackingProtectionOn)
-{
-  if (Preferences::GetBool("privacy.trackingprotection.enabled", false)) {
-    *aIsTrackingProtectionOn = true;
-  } else if (UsePrivateBrowsing() &&
-             Preferences::GetBool("privacy.trackingprotection.pbmode.enabled", false)) {
-    *aIsTrackingProtectionOn = true;
-  } else {
-    *aIsTrackingProtectionOn = false;
-  }
-
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsDocShell::GetIsContent(bool* aIsContent)
 {

docshell/base/nsDocShell.h

@@ -233,7 +233,6 @@ public:
   NS_IMETHOD GetUseRemoteTabs(bool*) override;
   NS_IMETHOD SetRemoteTabs(bool) override;
   NS_IMETHOD GetOriginAttributes(JS::MutableHandle<JS::Value>) override;
-  NS_IMETHOD IsTrackingProtectionOn(bool*) override;
 
   // Restores a cached presentation from history (mLSHE).
   // This method swaps out the content viewer and simulates loads for

docshell/base/nsILoadContext.idl

@@ -137,19 +137,4 @@ interface nsILoadContext : nsISupports
 #endif
 %}
 
-  /**
-   * Returns true if tracking protection is enabled for the load context.
-   */
-  boolean IsTrackingProtectionOn();
-
-%{C++
-  /**
-   * De-XPCOMed getter to make call-sites cleaner.
-   */
-  bool UseTrackingProtection() {
-    bool usingTP;
-    IsTrackingProtectionOn(&usingTP);
-    return usingTP;
-  }
-%}
 };

docshell/base/timeline/TimelineConsumers.cpp

@@ -6,6 +6,7 @@
 #include "TimelineConsumers.h"
 
 #include "mozilla/ClearOnShutdown.h"
+#include "jsapi.h"
 #include "nsAppRunner.h" // for XRE_IsContentProcess, XRE_IsParentProcess
 #include "nsDocShell.h"
 
@@ -125,6 +126,9 @@ TimelineConsumers::AddConsumer(nsDocShell* aDocShell)
   UniquePtr<ObservedDocShell>& observed = aDocShell->mObserved;
   MOZ_ASSERT(!observed);
 
+  if (mActiveConsumers == 0) {
+    JS::SetProfileTimelineRecordingEnabled(true);
+  }
   mActiveConsumers++;
 
   ObservedDocShell* obsDocShell = new ObservedDocShell(aDocShell);
@@ -144,6 +148,9 @@ TimelineConsumers::RemoveConsumer(nsDocShell* aDocShell)
   MOZ_ASSERT(observed);
 
   mActiveConsumers--;
+  if (mActiveConsumers == 0) {
+    JS::SetProfileTimelineRecordingEnabled(false);
+  }
 
   // Clear all markers from the `mTimelineMarkers` store.
   observed.get()->ClearMarkers();

dom/animation/moz.build

@@ -36,11 +36,6 @@ EXPORTS.mozilla += [
 ]
 
 UNIFIED_SOURCES += [
-    'KeyframeEffect.cpp',
-    'KeyframeEffectReadOnly.cpp',
-]
-
-SOURCES += [
     'Animation.cpp',
     'AnimationEffectReadOnly.cpp',
     'AnimationEffectTiming.cpp',
@@ -54,7 +49,9 @@ SOURCES += [
     'DocumentTimeline.cpp',
     'EffectCompositor.cpp',
     'EffectSet.cpp',
+    'KeyframeEffect.cpp',
     'KeyframeEffectParams.cpp',
+    'KeyframeEffectReadOnly.cpp',
     'KeyframeUtils.cpp',
     'PendingAnimationTracker.cpp',
     'TimingParams.cpp',

dom/audiochannel/moz.build

@@ -15,7 +15,7 @@ EXPORTS += [
     'AudioChannelService.h',
 ]
 
-SOURCES += [
+UNIFIED_SOURCES += [
     'AudioChannelAgent.cpp',
     'AudioChannelService.cpp',
 ]

dom/base/ChildIterator.cpp

@@ -536,23 +536,5 @@ StyleChildrenIterator::IsNeeded(const Element* aElement)
   return false;
 }
 
-
-nsIContent*
-StyleChildrenIterator::GetNextChild()
-{
-  while (nsIContent* child = AllChildrenIterator::GetNextChild()) {
-    if (IsNativeAnonymousImplementationOfPseudoElement(child)) {
-      // Skip any native-anonymous children that are used to implement pseudo-
-      // elements. These match pseudo-element selectors instead of being
-      // considered a child of their host, and thus the style system needs to
-      // handle them separately.
-    } else {
-      return child;
-    }
-  }
-
-  return nullptr;
-}
-
 } // namespace dom
 } // namespace mozilla

dom/base/ChildIterator.h

@@ -7,6 +7,8 @@
 #define ChildIterator_h
 
 #include "nsIContent.h"
+#include "nsIContentInlines.h"
+#include <stdint.h>
 
 /**
  * Iterates over the children on a node. If a child is an insertion point,
@@ -17,9 +19,6 @@
  * binding's <xbl:content> element.
  */
 
-#include <stdint.h>
-#include "nsAutoPtr.h"
-
 class nsIContent;
 
 namespace mozilla {
@@ -189,20 +188,33 @@ protected:
 class AllChildrenIterator : private FlattenedChildIterator
 {
 public:
-  AllChildrenIterator(const nsIContent* aNode, uint32_t aFlags,
-                      bool aStartAtBeginning = true) :
-    FlattenedChildIterator(aNode, aFlags, aStartAtBeginning),
-    mAnonKidsIdx(aStartAtBeginning ? UINT32_MAX : 0),
-    mFlags(aFlags), mPhase(aStartAtBeginning ? eAtBegin : eAtEnd) { }
+  AllChildrenIterator(const nsIContent* aNode,
+                      uint32_t aFlags,
+                      bool aStartAtBeginning = true)
+    : FlattenedChildIterator(aNode, aFlags, aStartAtBeginning)
+    , mAnonKidsIdx(aStartAtBeginning ? UINT32_MAX : 0)
+    , mFlags(aFlags), mPhase(aStartAtBeginning ? eAtBegin : eAtEnd)
+  {
+  }
 
   AllChildrenIterator(AllChildrenIterator&& aOther)
-    : FlattenedChildIterator(Move(aOther)),
-      mAnonKids(Move(aOther.mAnonKids)), mAnonKidsIdx(aOther.mAnonKidsIdx),
-      mFlags(aOther.mFlags), mPhase(aOther.mPhase)
+    : FlattenedChildIterator(Move(aOther))
+    , mAnonKids(Move(aOther.mAnonKids))
+    , mAnonKidsIdx(aOther.mAnonKidsIdx)
+    , mFlags(aOther.mFlags)
+    , mPhase(aOther.mPhase)
 #ifdef DEBUG
-      , mMutationGuard(aOther.mMutationGuard)
+    , mMutationGuard(aOther.mMutationGuard)
 #endif
-      {}
+  {
+  }
+
+  AllChildrenIterator& operator=(AllChildrenIterator&& aOther)
+  {
+    this->~AllChildrenIterator();
+    new (this)AllChildrenIterator(Move(aOther));
+    return *this;
+  }
 
 #ifdef DEBUG
   ~AllChildrenIterator() { MOZ_ASSERT(!mMutationGuard.Mutated(0)); }
@@ -268,20 +280,43 @@ private:
  */
 class StyleChildrenIterator : private AllChildrenIterator {
 public:
-  explicit StyleChildrenIterator(const nsIContent* aContent)
+  StyleChildrenIterator(const nsIContent* aContent,
+                        bool aStartAtBeginning = true)
     : AllChildrenIterator(aContent,
                           nsIContent::eAllChildren |
-                          nsIContent::eSkipDocumentLevelNativeAnonymousContent)
+                          nsIContent::eSkipDocumentLevelNativeAnonymousContent,
+                          aStartAtBeginning)
   {
     MOZ_COUNT_CTOR(StyleChildrenIterator);
   }
+
+  StyleChildrenIterator(StyleChildrenIterator&& aOther)
+    : AllChildrenIterator(Move(aOther))
+  {
+    MOZ_COUNT_CTOR(StyleChildrenIterator);
+  }
+
+  StyleChildrenIterator& operator=(StyleChildrenIterator&& aOther)
+  {
+    AllChildrenIterator::operator=(Move(aOther));
+    return *this;
+  }
+
   ~StyleChildrenIterator() { MOZ_COUNT_DTOR(StyleChildrenIterator); }
 
-  nsIContent* GetNextChild();
+  static nsIContent* GetParent(const nsIContent& aContent)
+  {
+    nsINode* node = aContent.GetFlattenedTreeParentNodeForStyle();
+    return node && node->IsContent() ? node->AsContent() : nullptr;
+  }
 
   // Returns true if we cannot find all the children we need to style by
   // traversing the siblings of the first child.
   static bool IsNeeded(const Element* aParent);
+
+  using AllChildrenIterator::GetNextChild;
+  using AllChildrenIterator::GetPreviousChild;
+  using AllChildrenIterator::Seek;
 };
 
 } // namespace dom

dom/base/CustomElementRegistry.cpp

@@ -15,6 +15,7 @@
 #include "nsContentUtils.h"
 #include "nsHTMLTags.h"
 #include "jsapi.h"
+#include "ShadowRoot.h"
 
 namespace mozilla {
 namespace dom {
@@ -415,6 +416,95 @@ CustomElementRegistry::EnqueueLifecycleCallback(nsIDocument::ElementCallbackType
   reactionsStack->EnqueueCallbackReaction(aCustomElement, Move(callback));
 }
 
+namespace {
+
+class CandidateFinder
+{
+public:
+  CandidateFinder(nsTArray<nsWeakPtr>&& aCandidates, nsIDocument* aDoc);
+  nsTArray<nsCOMPtr<Element>> OrderedCandidates();
+
+private:
+  bool Traverse(Element* aRoot, nsTArray<nsCOMPtr<Element>>& aOrderedElements);
+
+  nsCOMPtr<nsIDocument> mDoc;
+  nsInterfaceHashtable<nsPtrHashKey<Element>, Element> mCandidates;
+};
+
+CandidateFinder::CandidateFinder(nsTArray<nsWeakPtr>&& aCandidates,
+                                 nsIDocument* aDoc)
+  : mDoc(aDoc)
+  , mCandidates(aCandidates.Length())
+{
+  MOZ_ASSERT(mDoc);
+  for (auto& candidate : aCandidates) {
+    nsCOMPtr<Element> elem = do_QueryReferent(candidate);
+    if (!elem) {
+      continue;
+    }
+
+    Element* key = elem.get();
+    mCandidates.Put(key, elem.forget());
+  }
+}
+
+nsTArray<nsCOMPtr<Element>>
+CandidateFinder::OrderedCandidates()
+{
+  if (mCandidates.Count() == 1) {
+    // Fast path for one candidate.
+    for (auto iter = mCandidates.Iter(); !iter.Done(); iter.Next()) {
+      nsTArray<nsCOMPtr<Element>> rval({ Move(iter.Data()) });
+      iter.Remove();
+      return rval;
+    }
+  }
+
+  nsTArray<nsCOMPtr<Element>> orderedElements(mCandidates.Count());
+  for (Element* child = mDoc->GetFirstElementChild(); child; child = child->GetNextElementSibling()) {
+    if (!Traverse(child->AsElement(), orderedElements)) {
+      break;
+    }
+  }
+
+  return orderedElements;
+}
+
+bool
+CandidateFinder::Traverse(Element* aRoot, nsTArray<nsCOMPtr<Element>>& aOrderedElements)
+{
+  nsCOMPtr<Element> elem = mCandidates.Get(aRoot);
+  if (elem) {
+    mCandidates.Remove(aRoot);
+    aOrderedElements.AppendElement(Move(elem));
+    if (mCandidates.Count() == 0) {
+      return false;
+    }
+  }
+
+  if (ShadowRoot* root = aRoot->GetShadowRoot()) {
+    // First iterate the children of the shadow root if aRoot is a shadow host.
+    for (Element* child = root->GetFirstElementChild(); child;
+         child = child->GetNextElementSibling()) {
+      if (!Traverse(child, aOrderedElements)) {
+        return false;
+      }
+    }
+  }
+
+  // Iterate the explicit children of aRoot.
+  for (Element* child = aRoot->GetFirstElementChild(); child;
+       child = child->GetNextElementSibling()) {
+    if (!Traverse(child, aOrderedElements)) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+}
+
 void
 CustomElementRegistry::UpgradeCandidates(nsIAtom* aKey,
                                          CustomElementDefinition* aDefinition,
@@ -426,18 +516,13 @@ CustomElementRegistry::UpgradeCandidates(nsIAtom* aKey,
     return;
   }
 
-  // TODO: Bug 1326028 - Upgrade custom element in shadow-including tree order
   nsAutoPtr<nsTArray<nsWeakPtr>> candidates;
   mCandidatesMap.RemoveAndForget(aKey, candidates);
   if (candidates) {
     CustomElementReactionsStack* reactionsStack =
       docGroup->CustomElementReactionsStack();
-    for (size_t i = 0; i < candidates->Length(); ++i) {
-      nsCOMPtr<Element> elem = do_QueryReferent(candidates->ElementAt(i));
-      if (!elem) {
-        continue;
-      }
-
+    CandidateFinder finder(Move(*candidates), mWindow->GetExtantDoc());
+    for (auto& elem : finder.OrderedCandidates()) {
       reactionsStack->EnqueueUpgradeReaction(elem, aDefinition);
     }
   }
@@ -791,6 +876,45 @@ CustomElementRegistry::Define(const nsAString& aName,
 
 }
 
+static void
+TryUpgrade(nsINode& aNode)
+{
+  Element* element = aNode.IsElement() ? aNode.AsElement() : nullptr;
+  if (element) {
+    CustomElementData* ceData = element->GetCustomElementData();
+    if (ceData) {
+      NodeInfo* nodeInfo = element->NodeInfo();
+      nsIAtom* typeAtom = ceData->GetCustomElementType();
+      CustomElementDefinition* definition =
+        nsContentUtils::LookupCustomElementDefinition(nodeInfo->GetDocument(),
+                                                      nodeInfo->NameAtom(),
+                                                      nodeInfo->NamespaceID(),
+                                                      typeAtom);
+      if (definition) {
+        nsContentUtils::EnqueueUpgradeReaction(element, definition);
+      }
+    }
+
+    if (ShadowRoot* root = element->GetShadowRoot()) {
+      for (Element* child = root->GetFirstElementChild(); child;
+           child = child->GetNextElementSibling()) {
+        TryUpgrade(*child);
+      }
+    }
+  }
+
+  for (Element* child = aNode.GetFirstElementChild(); child;
+       child = child->GetNextElementSibling()) {
+    TryUpgrade(*child);
+  }
+}
+
+void
+CustomElementRegistry::Upgrade(nsINode& aRoot)
+{
+  TryUpgrade(aRoot);
+}
+
 void
 CustomElementRegistry::Get(JSContext* aCx, const nsAString& aName,
                            JS::MutableHandle<JS::Value> aRetVal)

dom/base/CustomElementRegistry.h

@@ -525,6 +525,8 @@ public:
            JS::MutableHandle<JS::Value> aRetVal);
 
   already_AddRefed<Promise> WhenDefined(const nsAString& aName, ErrorResult& aRv);
+
+  void Upgrade(nsINode& aRoot);
 };
 
 class MOZ_RAII AutoCEReaction final {

dom/base/DocumentOrShadowRoot.cpp

@@ -4,11 +4,14 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "DocumentOrShadowRoot.h"
+#include "mozilla/EventStateManager.h"
 #include "mozilla/dom/StyleSheetList.h"
 #include "nsDocument.h"
 #include "nsFocusManager.h"
 #include "ShadowRoot.h"
 #include "XULDocument.h"
+#include "nsLayoutUtils.h"
+#include "nsSVGUtils.h"
 
 class nsINode;
 class nsIDocument;
@@ -144,5 +147,158 @@ DocumentOrShadowRoot::GetRetargetedFocusedElement()
   return nullptr;
 }
 
+Element*
+DocumentOrShadowRoot::GetPointerLockElement()
+{
+  nsCOMPtr<Element> pointerLockedElement =
+    do_QueryReferent(EventStateManager::sPointerLockedElement);
+  if (!pointerLockedElement) {
+    return nullptr;
+  }
+
+  nsIContent* retargetedPointerLockedElement = Retarget(pointerLockedElement);
+  return
+    retargetedPointerLockedElement && retargetedPointerLockedElement->IsElement() ?
+      retargetedPointerLockedElement->AsElement() : nullptr;
+}
+
+Element*
+DocumentOrShadowRoot::GetFullscreenElement()
+{
+  if (!AsNode().IsInComposedDoc()) {
+    return nullptr;
+  }
+
+  Element* element = AsNode().OwnerDoc()->FullScreenStackTop();
+  NS_ASSERTION(!element ||
+               element->State().HasState(NS_EVENT_STATE_FULL_SCREEN),
+    "Fullscreen element should have fullscreen styles applied");
+
+  nsIContent* retargeted = Retarget(element);
+  if (retargeted && retargeted->IsElement()) {
+    return retargeted->AsElement();
+  }
+
+  return nullptr;
+}
+
+Element*
+DocumentOrShadowRoot::ElementFromPoint(float aX, float aY)
+{
+  return ElementFromPointHelper(aX, aY, false, true);
+}
+
+void
+DocumentOrShadowRoot::ElementsFromPoint(float aX, float aY,
+                                        nsTArray<RefPtr<Element>>& aElements)
+{
+  ElementsFromPointHelper(aX, aY, nsIDocument::FLUSH_LAYOUT, aElements);
+}
+
+Element*
+DocumentOrShadowRoot::ElementFromPointHelper(float aX, float aY,
+                                             bool aIgnoreRootScrollFrame,
+                                             bool aFlushLayout)
+{
+  AutoTArray<RefPtr<Element>, 1> elementArray;
+  ElementsFromPointHelper(aX, aY,
+                          ((aIgnoreRootScrollFrame ? nsIDocument::IGNORE_ROOT_SCROLL_FRAME : 0) |
+                           (aFlushLayout ? nsIDocument::FLUSH_LAYOUT : 0) |
+                           nsIDocument::IS_ELEMENT_FROM_POINT),
+                          elementArray);
+  if (elementArray.IsEmpty()) {
+    return nullptr;
+  }
+  return elementArray[0];
+}
+
+void
+DocumentOrShadowRoot::ElementsFromPointHelper(float aX, float aY,
+                                              uint32_t aFlags,
+                                              nsTArray<RefPtr<mozilla::dom::Element>>& aElements)
+{
+  // As per the the spec, we return null if either coord is negative
+  if (!(aFlags & nsIDocument::IGNORE_ROOT_SCROLL_FRAME) && (aX < 0 || aY < 0)) {
+    return;
+  }
+
+  nscoord x = nsPresContext::CSSPixelsToAppUnits(aX);
+  nscoord y = nsPresContext::CSSPixelsToAppUnits(aY);
+  nsPoint pt(x, y);
+
+  nsCOMPtr<nsIDocument> doc = AsNode().OwnerDoc();
+
+  // Make sure the layout information we get is up-to-date, and
+  // ensure we get a root frame (for everything but XUL)
+  if (aFlags & nsIDocument::FLUSH_LAYOUT) {
+    doc->FlushPendingNotifications(Flush_Layout);
+  }
+
+  nsIPresShell* ps = doc->GetShell();
+  if (!ps) {
+    return;
+  }
+  nsIFrame* rootFrame = ps->GetRootFrame();
+
+  // XUL docs, unlike HTML, have no frame tree until everything's done loading
+  if (!rootFrame) {
+    return; // return null to premature XUL callers as a reminder to wait
+  }
+
+  nsTArray<nsIFrame*> outFrames;
+  // Emulate what GetFrameAtPoint does, since we want all the frames under our
+  // point.
+  nsLayoutUtils::GetFramesForArea(rootFrame, nsRect(pt, nsSize(1, 1)), outFrames,
+    nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC |
+    ((aFlags & nsIDocument::IGNORE_ROOT_SCROLL_FRAME) ? nsLayoutUtils::IGNORE_ROOT_SCROLL_FRAME : 0));
+
+  // Dunno when this would ever happen, as we should at least have a root frame under us?
+  if (outFrames.IsEmpty()) {
+    return;
+  }
+
+  // Used to filter out repeated elements in sequence.
+  nsIContent* lastAdded = nullptr;
+
+  for (uint32_t i = 0; i < outFrames.Length(); i++) {
+    nsIContent* node = doc->GetContentInThisDocument(outFrames[i]);
+
+    if (!node || !node->IsElement()) {
+      // If this helper is called via ElementsFromPoint, we need to make sure
+      // our frame is an element. Otherwise return whatever the top frame is
+      // even if it isn't the top-painted element.
+      // SVG 'text' element's SVGTextFrame doesn't respond to hit-testing, so
+      // if 'node' is a child of such an element then we need to manually defer
+      // to the parent here.
+      if (!(aFlags & nsIDocument::IS_ELEMENT_FROM_POINT) &&
+          !outFrames[i]->IsSVGText()) {
+        continue;
+      }
+      node = node->GetParent();
+      if (node) {
+        ShadowRoot* shadow = ShadowRoot::FromNode(node);
+        if (shadow) {
+          node = shadow->Host();
+        }
+      }
+    }
+
+    //XXXsmaug There is plenty of unspec'ed behavior here
+    //         https://github.com/w3c/webcomponents/issues/735
+    //         https://github.com/w3c/webcomponents/issues/736
+    node = Retarget(node);
+
+    if (node && node != lastAdded) {
+      aElements.AppendElement(node->AsElement());
+      lastAdded = node;
+      // If this helper is called via ElementFromPoint, just return the first
+      // element we find.
+      if (aFlags & nsIDocument::IS_ELEMENT_FROM_POINT) {
+        return;
+      }
+    }
+  }
+}
+
 }
 }

dom/base/DocumentOrShadowRoot.h

@@ -114,6 +114,32 @@ public:
 
   ~DocumentOrShadowRoot() = default;
 
+  Element* GetPointerLockElement();
+  Element* GetFullscreenElement();
+
+  Element* ElementFromPoint(float aX, float aY);
+  void ElementsFromPoint(float aX, float aY,
+                         nsTArray<RefPtr<mozilla::dom::Element>>& aElements);
+
+  /**
+   * Helper for nsIDOMDocument::elementFromPoint implementation that allows
+   * ignoring the scroll frame and/or avoiding layout flushes.
+   *
+   * @see nsIDOMWindowUtils::elementFromPoint
+   */
+  Element* ElementFromPointHelper(float aX, float aY,
+                                  bool aIgnoreRootScrollFrame,
+                                  bool aFlushLayout);
+  enum ElementsFromPointFlags
+  {
+    IGNORE_ROOT_SCROLL_FRAME = 1,
+    FLUSH_LAYOUT = 2,
+    IS_ELEMENT_FROM_POINT = 4
+  };
+
+  void ElementsFromPointHelper(float aX, float aY, uint32_t aFlags,
+                               nsTArray<RefPtr<mozilla::dom::Element>>& aElements);
+
 protected:
   nsIContent* Retarget(nsIContent* aContent) const;
 

dom/base/Element.cpp

@@ -1122,18 +1122,6 @@ Element::AttachShadow(const ShadowRootInit& aInit, ErrorResult& aError)
     return nullptr;
   }
 
-  return AttachShadowInternal(aInit.mMode == ShadowRootMode::Closed, aError);
-}
-
-already_AddRefed<ShadowRoot>
-Element::CreateShadowRoot(ErrorResult& aError)
-{
-  return AttachShadowInternal(false, aError);
-}
-
-already_AddRefed<ShadowRoot>
-Element::AttachShadowInternal(bool aClosed, ErrorResult& aError)
-{
   /**
    * 3. If context object is a shadow host, then throw
    *    an "InvalidStateError" DOMException.
@@ -1179,8 +1167,9 @@ Element::AttachShadowInternal(bool aClosed, ErrorResult& aError)
    *    context object???s node document, host is context object,
    *    and mode is init???s mode.
    */
+  bool isClosed = (aInit.mMode == ShadowRootMode::Closed);
   RefPtr<ShadowRoot> shadowRoot =
-    new ShadowRoot(this, aClosed, nodeInfo.forget(), protoBinding);
+    new ShadowRoot(this, isClosed, nodeInfo.forget(), protoBinding);
 
   shadowRoot->SetIsComposedDocParticipant(IsInComposedDoc());
 
@@ -1717,10 +1706,11 @@ Element::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
     if (!hadParent) {
       uint32_t editableDescendantChange = EditableInclusiveDescendantCount(this);
       if (editableDescendantChange != 0) {
-      // If we are binding a subtree root to the document, we need to update
-      // the editable descendant count of all the ancestors.
+        // If we are binding a subtree root to the document, we need to update
+        // the editable descendant count of all the ancestors. However, we don't
+        // cross the Shadow DOM boundary (expected behavior is unclear).
         nsIContent* parent = GetParent();
-        while (parent) {
+        while (parent && parent->IsElement()) {
           parent->ChangeEditableDescendantCount(editableDescendantChange);
           parent = parent->GetParent();
         }
@@ -3428,9 +3418,9 @@ Element::Closest(const nsAString& aSelector, ErrorResult& aResult)
   matchingContext.AddScopeElement(this);
   for (nsINode* node = this; node; node = node->GetParentNode()) {
     if (node->IsElement() &&
-        nsCSSRuleProcessor::SelectorListMatches(node->AsElement(),
-                                                matchingContext,
-                                                selectorList)) {
+        nsCSSRuleProcessor::RestrictedSelectorListMatches(node->AsElement(),
+                                                          matchingContext,
+                                                          selectorList)) {
       return node->AsElement();
     }
   }
@@ -3454,8 +3444,9 @@ Element::Matches(const nsAString& aSelector, ErrorResult& aError)
                                    TreeMatchContext::eNeverMatchVisited);
   matchingContext.SetHasSpecifiedScope();
   matchingContext.AddScopeElement(this);
-  return nsCSSRuleProcessor::SelectorListMatches(this, matchingContext,
-                                                 selectorList);
+  return nsCSSRuleProcessor::RestrictedSelectorListMatches(this,
+                                                           matchingContext,
+                                                           selectorList);
 }
 
 static const nsAttrValue::EnumTable kCORSAttributeTable[] = {

dom/base/Element.h

@@ -470,9 +470,6 @@ protected:
     mState &= ~aStates;
   }
 
-  already_AddRefed<ShadowRoot> AttachShadowInternal(bool aClosed,
-                                                    ErrorResult& aError);
-
 private:
   // Need to allow the ESM, nsGlobalWindow, and the focus manager to
   // set our state
@@ -930,9 +927,6 @@ public:
   void SetSlot(const nsAString& aName, ErrorResult& aError);
   void GetSlot(nsAString& aName);
 
-  // [deprecated] Shadow DOM v0
-  already_AddRefed<ShadowRoot> CreateShadowRoot(ErrorResult& aError);
-
   ShadowRoot *FastGetShadowRoot() const
   {
     nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots();

dom/base/EventSource.h

@@ -35,221 +35,81 @@ namespace dom {
 
 struct EventSourceInit;
 
+class EventSourceImpl;
+
 class EventSource final : public DOMEventTargetHelper
-                        , public nsIObserver
-                        , public nsIStreamListener
-                        , public nsIChannelEventSink
-                        , public nsIInterfaceRequestor
-                        , public nsSupportsWeakReference
 {
+  friend class EventSourceImpl;
 public:
-  explicit EventSource(nsPIDOMWindowInner* aOwnerWindow);
   NS_DECL_ISUPPORTS_INHERITED
-  NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_INHERITED(
-    EventSource, DOMEventTargetHelper)
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(EventSource, DOMEventTargetHelper)
+  virtual bool IsCertainlyAliveForCC() const override;
 
-  NS_DECL_NSIOBSERVER
-  NS_DECL_NSISTREAMLISTENER
-  NS_DECL_NSIREQUESTOBSERVER
-  NS_DECL_NSICHANNELEVENTSINK
-  NS_DECL_NSIINTERFACEREQUESTOR
+  // EventTarget
+  void DisconnectFromOwner() override
+  {
+    DOMEventTargetHelper::DisconnectFromOwner();
+    Close();
+  }
 
-  // nsWrapperCache
-  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
 
   // WebIDL
-  nsPIDOMWindowInner*
-  GetParentObject() const
-  {
-    return GetOwner();
-  }
   static already_AddRefed<EventSource>
   Constructor(const GlobalObject& aGlobal, const nsAString& aURL,
-              const EventSourceInit& aEventSourceInitDict,
-              ErrorResult& aRv);
+              const EventSourceInit& aEventSourceInitDict, ErrorResult& aRv);
 
   void GetUrl(nsAString& aURL) const
   {
+    AssertIsOnTargetThread();
     aURL = mOriginalURL;
   }
+
   bool WithCredentials() const
   {
+    AssertIsOnTargetThread();
     return mWithCredentials;
   }
 
-  enum {
-    CONNECTING = 0U,
-    OPEN = 1U,
-    CLOSED = 2U
-  };
   uint16_t ReadyState() const
   {
+    AssertIsOnTargetThread();
     return mReadyState;
   }
 
   IMPL_EVENT_HANDLER(open)
   IMPL_EVENT_HANDLER(message)
   IMPL_EVENT_HANDLER(error)
+
   void Close();
 
-  virtual void DisconnectFromOwner() override;
-
-protected:
-  virtual ~EventSource();
-
-  MOZ_IS_CLASS_INIT
-  nsresult Init(nsISupports* aOwner,
-                const nsAString& aURL,
-                bool aWithCredentials);
-
-  nsresult GetBaseURI(nsIURI **aBaseURI);
-
-  void SetupHttpChannel();
-  nsresult SetupReferrerPolicy();
-  nsresult InitChannelAndRequestEventSource();
-  nsresult ResetConnection();
-  nsresult DispatchFailConnection();
-  nsresult SetReconnectionTimeout();
-
-  void AnnounceConnection();
-  void DispatchAllMessageEvents();
-  void ReestablishConnection();
-  void FailConnection();
-
-  nsresult Thaw();
-  nsresult Freeze();
-
-  static void TimerCallback(nsITimer *aTimer, void *aClosure);
-
-  nsresult PrintErrorOnConsole(const char       *aBundleURI,
-                               const char16_t  *aError,
-                               const char16_t **aFormatStrings,
-                               uint32_t          aFormatStringsLen);
-  nsresult ConsoleError();
-
-  static nsresult StreamReaderFunc(nsIInputStream *aInputStream,
-                                   void           *aClosure,
-                                   const char     *aFromRawSegment,
-                                   uint32_t        aToOffset,
-                                   uint32_t        aCount,
-                                   uint32_t       *aWriteCount);
-  nsresult SetFieldAndClear();
-  nsresult ClearFields();
-  nsresult ResetEvent();
-  nsresult DispatchCurrentMessageEvent();
-  nsresult ParseCharacter(char16_t aChr);
-  nsresult CheckHealthOfRequestCallback(nsIRequest *aRequestCallback);
-  nsresult OnRedirectVerifyCallback(nsresult result);
-
-  nsCOMPtr<nsIURI> mSrc;
-
-  nsString mLastEventID;
-  uint32_t mReconnectionTime;  // in ms
-
-  struct Message {
-    nsString mEventName;
-    nsString mLastEventID;
-    nsString mData;
-  };
-  nsDeque mMessagesToDispatch;
-  Message mCurrentMessage;
-
-  /**
-   * A simple state machine used to manage the event-source's line buffer
-   *
-   * PARSE_STATE_OFF              -> PARSE_STATE_BEGIN_OF_STREAM
-   *
-   * PARSE_STATE_BEGIN_OF_STREAM  -> PARSE_STATE_BOM_WAS_READ |
-   *                                 PARSE_STATE_CR_CHAR |
-   *                                 PARSE_STATE_BEGIN_OF_LINE |
-   *                                 PARSE_STATE_COMMENT |
-   *                                 PARSE_STATE_FIELD_NAME
-   *
-   * PARSE_STATE_BOM_WAS_READ     -> PARSE_STATE_CR_CHAR |
-   *                                 PARSE_STATE_BEGIN_OF_LINE |
-   *                                 PARSE_STATE_COMMENT |
-   *                                 PARSE_STATE_FIELD_NAME
-   *
-   * PARSE_STATE_CR_CHAR -> PARSE_STATE_CR_CHAR |
-   *                        PARSE_STATE_COMMENT |
-   *                        PARSE_STATE_FIELD_NAME |
-   *                        PARSE_STATE_BEGIN_OF_LINE
-   *
-   * PARSE_STATE_COMMENT -> PARSE_STATE_CR_CHAR |
-   *                        PARSE_STATE_BEGIN_OF_LINE
-   *
-   * PARSE_STATE_FIELD_NAME   -> PARSE_STATE_CR_CHAR |
-   *                             PARSE_STATE_BEGIN_OF_LINE |
-   *                             PARSE_STATE_FIRST_CHAR_OF_FIELD_VALUE
-   *
-   * PARSE_STATE_FIRST_CHAR_OF_FIELD_VALUE  -> PARSE_STATE_FIELD_VALUE |
-   *                                           PARSE_STATE_CR_CHAR |
-   *                                           PARSE_STATE_BEGIN_OF_LINE
-   *
-   * PARSE_STATE_FIELD_VALUE      -> PARSE_STATE_CR_CHAR |
-   *                                 PARSE_STATE_BEGIN_OF_LINE
-   *
-   * PARSE_STATE_BEGIN_OF_LINE   -> PARSE_STATE_CR_CHAR |
-   *                                PARSE_STATE_COMMENT |
-   *                                PARSE_STATE_FIELD_NAME |
-   *                                PARSE_STATE_BEGIN_OF_LINE
-   *
-   * Whenever the parser find an empty line or the end-of-file
-   * it dispatches the stacked event.
-   *
-   */
-  enum ParserStatus {
-    PARSE_STATE_OFF,
-    PARSE_STATE_BEGIN_OF_STREAM,
-    PARSE_STATE_BOM_WAS_READ,
-    PARSE_STATE_CR_CHAR,
-    PARSE_STATE_COMMENT,
-    PARSE_STATE_FIELD_NAME,
-    PARSE_STATE_FIRST_CHAR_OF_FIELD_VALUE,
-    PARSE_STATE_FIELD_VALUE,
-    PARSE_STATE_BEGIN_OF_LINE
-  };
-  ParserStatus mStatus;
-
-  bool mFrozen;
-  bool mErrorLoadOnRedirect;
-  bool mGoingToDispatchAllMessages;
-  bool mWithCredentials;
-  bool mWaitingForOnStopRequest;
-
-  // used while reading the input streams
-  nsCOMPtr<nsIUnicodeDecoder> mUnicodeDecoder;
-  nsresult mLastConvertionResult;
-  nsString mLastFieldName;
-  nsString mLastFieldValue;
-
-  nsCOMPtr<nsILoadGroup> mLoadGroup;
-
-  nsCOMPtr<nsIHttpChannel> mHttpChannel;
-
-  nsCOMPtr<nsITimer> mTimer;
-
-  uint16_t mReadyState;
-  nsString mOriginalURL;
-
-  nsCOMPtr<nsIPrincipal> mPrincipal;
-  nsString mOrigin;
-
-  // Event Source owner information:
-  // - the script file name
-  // - source code line number and column number where the Event Source object
-  //   was constructed.
-  // - the ID of the inner window where the script lives. Note that this may not
-  //   be the same as the Event Source owner window.
-  // These attributes are used for error reporting.
-  nsString mScriptFile;
-  uint32_t mScriptLine;
-  uint32_t mScriptColumn;
-  uint64_t mInnerWindowID;
-
 private:
-  EventSource(const EventSource& x);   // prevent bad usage
-  EventSource& operator=(const EventSource& x);
+  EventSource(nsPIDOMWindowInner* aOwnerWindow, bool aWithCredentials);
+  virtual ~EventSource();
+  // prevent bad usage
+  EventSource(const EventSource& x) = delete;
+  EventSource& operator=(const EventSource& x) = delete;
+
+  void AssertIsOnTargetThread() const
+  {
+    MOZ_ASSERT(NS_IsMainThread() == mIsMainThread);
+  }
+
+  nsresult CreateAndDispatchSimpleEvent(const nsAString& aName);
+
+  // Raw pointer because this EventSourceImpl is created, managed and destroyed
+  // by EventSource.
+  EventSourceImpl* mImpl;
+  nsString mOriginalURL;
+  uint16_t mReadyState;
+  bool mWithCredentials;
+  bool mIsMainThread;
+  // This is used to keep EventSourceImpl instance when there is a connection.
+  bool mKeepingAlive;
+
+  void UpdateMustKeepAlive();
+  void UpdateDontKeepAlive();
 };
 
 } // namespace dom

dom/base/FragmentOrElement.cpp

@@ -797,6 +797,22 @@ FindChromeAccessOnlySubtreeOwner(nsIContent* aContent)
   return aContent;
 }
 
+already_AddRefed<nsINode>
+FindChromeAccessOnlySubtreeOwner(EventTarget* aTarget)
+{
+  nsCOMPtr<nsINode> node = do_QueryInterface(aTarget);
+  if (!node || !node->ChromeOnlyAccess()) {
+    return node.forget();
+  }
+
+  if (!node->IsContent()) {
+    return nullptr;
+  }
+
+  node = FindChromeAccessOnlySubtreeOwner(node->AsContent());
+  return node.forget();
+}
+
 nsresult
 nsIContent::GetEventTargetParent(EventChainPreVisitor& aVisitor)
 {
@@ -817,24 +833,11 @@ nsIContent::GetEventTargetParent(EventChainPreVisitor& aVisitor)
       // chrome access only subtree or if we are about to propagate out of
       // a shadow root to a shadow root host.
       ((this == aVisitor.mEvent->mOriginalTarget &&
-        !ChromeOnlyAccess()) || isAnonForEvents || GetShadowRoot())) {
+        !ChromeOnlyAccess()) || isAnonForEvents)) {
      nsCOMPtr<nsIContent> relatedTarget =
        do_QueryInterface(aVisitor.mEvent->AsMouseEvent()->mRelatedTarget);
     if (relatedTarget &&
         relatedTarget->OwnerDoc() == OwnerDoc()) {
-
-      // In the web components case, we may need to stop propagation of events
-      // at shadow root host.
-      if (GetShadowRoot()) {
-        nsIContent* adjustedTarget =
-          Event::GetShadowRelatedTarget(this, relatedTarget);
-        if (this == adjustedTarget) {
-          aVisitor.SetParentTarget(nullptr, false);
-          aVisitor.mCanHandle = false;
-          return NS_OK;
-        }
-      }
-
       // If current target is anonymous for events or we know that related
       // target is descendant of an element which is anonymous for events,
       // we may want to stop event propagation.
@@ -950,6 +953,104 @@ nsIContent::GetEventTargetParent(EventChainPreVisitor& aVisitor)
   } else {
     aVisitor.SetParentTarget(GetComposedDoc(), false);
   }
+
+  if (!ChromeOnlyAccess() && !aVisitor.mRelatedTargetRetargetedInCurrentScope) {
+    // We don't support Shadow DOM in native anonymous content yet.
+    aVisitor.mRelatedTargetRetargetedInCurrentScope = true;
+    if (aVisitor.mEvent->mOriginalRelatedTarget) {
+      // https://dom.spec.whatwg.org/#concept-event-dispatch
+      // Step 3.
+      // "Let relatedTarget be the result of retargeting event's relatedTarget
+      //  against target if event's relatedTarget is non-null, and null
+      //  otherwise."
+      //
+      // This is a bit complicated because the event might be from native
+      // anonymous content, but we need to deal with non-native anonymous
+      // content there.
+      bool initialTarget = this == aVisitor.mEvent->mOriginalTarget;
+      nsCOMPtr<nsINode> originalTargetAsNode;
+      // Use of mOriginalTargetIsInAnon is an optimization here.
+      if (!initialTarget && aVisitor.mOriginalTargetIsInAnon) {
+        originalTargetAsNode =
+          FindChromeAccessOnlySubtreeOwner(aVisitor.mEvent->mOriginalTarget);
+        initialTarget = originalTargetAsNode == this;
+      }
+      if (initialTarget) {
+        nsCOMPtr<nsINode> relatedTargetAsNode =
+          FindChromeAccessOnlySubtreeOwner(aVisitor.mEvent->mOriginalRelatedTarget);
+        if (!originalTargetAsNode) {
+          originalTargetAsNode =
+            do_QueryInterface(aVisitor.mEvent->mOriginalTarget);
+        }
+
+        if (relatedTargetAsNode && originalTargetAsNode) {
+          nsINode* retargetedRelatedTarget =
+            nsContentUtils::Retarget(relatedTargetAsNode, originalTargetAsNode);
+          if (originalTargetAsNode == retargetedRelatedTarget &&
+              retargetedRelatedTarget != relatedTargetAsNode) {
+            // Step 4.
+            // "If target is relatedTarget and target is not event's
+            //  relatedTarget, then return true."
+            aVisitor.IgnoreCurrentTargetBecauseOfShadowDOMRetargeting();
+            // Old code relies on mTarget to point to the first element which
+            // was not added to the event target chain because of mCanHandle
+            // being false, but in Shadow DOM case mTarget really should
+            // point to a node in Shadow DOM.
+            aVisitor.mEvent->mTarget = aVisitor.mTargetInKnownToBeHandledScope;
+            return NS_OK;
+          }
+
+          // Part of step 5. Retargeting target has happened already higher
+          // up in this method.
+          // "Append to an event path with event, target, targetOverride,
+          //  relatedTarget, and false."
+          aVisitor.mRetargetedRelatedTarget = retargetedRelatedTarget;
+        }
+      } else {
+        nsCOMPtr<nsINode> relatedTargetAsNode =
+          FindChromeAccessOnlySubtreeOwner(aVisitor.mEvent->mOriginalRelatedTarget);
+        if (relatedTargetAsNode) {
+          // Step 11.3.
+          // "Let relatedTarget be the result of retargeting event's
+          // relatedTarget against parent if event's relatedTarget is non-null,
+          // and null otherwise.".
+          nsINode* retargetedRelatedTarget =
+            nsContentUtils::Retarget(relatedTargetAsNode, this);
+          nsCOMPtr<nsINode> targetInKnownToBeHandledScope =
+            FindChromeAccessOnlySubtreeOwner(aVisitor.mTargetInKnownToBeHandledScope);
+          if (nsContentUtils::ContentIsShadowIncludingDescendantOf(
+                this, targetInKnownToBeHandledScope->SubtreeRoot())) {
+            // Part of step 11.4.
+            // "If target's root is a shadow-including inclusive ancestor of
+            //  parent, then"
+            // "...Append to an event path with event, parent, null, relatedTarget,
+            // "   and slot-in-closed-tree."
+            aVisitor.mRetargetedRelatedTarget = retargetedRelatedTarget;
+          } else if (this == retargetedRelatedTarget) {
+            // Step 11.5
+            // "Otherwise, if parent and relatedTarget are identical, then set
+            //  parent to null."
+            aVisitor.IgnoreCurrentTargetBecauseOfShadowDOMRetargeting();
+            // Old code relies on mTarget to point to the first element which
+            // was not added to the event target chain because of mCanHandle
+            // being false, but in Shadow DOM case mTarget really should
+            // point to a node in Shadow DOM.
+            aVisitor.mEvent->mTarget = aVisitor.mTargetInKnownToBeHandledScope;
+            return NS_OK;
+          } else {
+            // Step 11.6
+            aVisitor.mRetargetedRelatedTarget = retargetedRelatedTarget;
+          }
+        }
+      }
+    }
+  }
+
+  if (slot) {
+    // Inform that we're about to exit the current scope.
+    aVisitor.mRelatedTargetRetargetedInCurrentScope = false;
+  }
+
   return NS_OK;
 }
 
@@ -1917,7 +2018,7 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(FragmentOrElement)
     }
 
     nsAutoCString orphan;
-    if (!tmp->IsInUncomposedDoc() &&
+    if (!tmp->IsInComposedDoc() &&
         // Ignore xbl:content, which is never in the document and hence always
         // appears to be orphaned.
         !tmp->NodeInfo()->Equals(nsGkAtoms::content, kNameSpaceID_XBL)) {

dom/base/Navigator.cpp

@@ -1390,9 +1390,8 @@ Navigator::GetPlatform(nsAString& aPlatform, bool aUsePrefOverriddenValue)
   aPlatform.AssignLiteral("Win32");
 #elif defined(XP_MACOSX) && defined(__ppc__)
   aPlatform.AssignLiteral("MacPPC");
-#elif defined(XP_MACOSX) && defined(__i386__)
-  aPlatform.AssignLiteral("MacIntel");
-#elif defined(XP_MACOSX) && defined(__x86_64__)
+#elif defined(XP_MACOSX)
+  // Always return "MacIntel", even on ARM64 macOS like Safari does.
   aPlatform.AssignLiteral("MacIntel");
 #else
   // XXX Communicator uses compiled-in build-time string defines

dom/base/ShadowRoot.cpp

@@ -9,6 +9,7 @@
 #include "mozilla/dom/DocumentFragment.h"
 #include "ChildIterator.h"
 #include "nsContentUtils.h"
+#include "nsLayoutUtils.h"
 #include "nsDOMClassInfoID.h"
 #include "nsIDOMHTMLElement.h"
 #include "nsIStyleSheetLinkingElement.h"
@@ -101,6 +102,23 @@ ShadowRoot::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
   return mozilla::dom::ShadowRootBinding::Wrap(aCx, this, aGivenProto);
 }
 
+void
+ShadowRoot::CloneInternalDataFrom(ShadowRoot* aOther)
+{
+  size_t sheetCount = aOther->SheetCount();
+  for (size_t i = 0; i < sheetCount; ++i) {
+    StyleSheet* sheet = aOther->SheetAt(i);
+    if (sheet && sheet->IsApplicable()) {
+      // TODO: Remove AsGecko() call once Stylo is removed.
+      RefPtr<CSSStyleSheet> clonedSheet =
+        sheet->AsGecko()->Clone(nullptr, nullptr, nullptr, nullptr);
+      if (clonedSheet) {
+        AppendStyleSheet(*clonedSheet);
+      }
+    }
+  }
+}
+
 ShadowRoot*
 ShadowRoot::FromNode(nsINode* aNode)
 {
@@ -145,6 +163,19 @@ ShadowRoot::AddSlot(HTMLSlotElement* aSlot)
 
       oldSlot->RemoveAssignedNode(assignedNode);
       currentSlot->AppendAssignedNode(assignedNode);
+
+      Element* restyleElement;
+      if (assignedNode->IsElement()) {
+        restyleElement = assignedNode->AsElement();
+      } else {
+        // This is likely a text node. Use the host instead.
+        restyleElement = GetHost();
+      }
+      if (restyleElement) {
+        nsLayoutUtils::PostRestyleEvent(
+          restyleElement, eRestyle_Subtree, nsChangeHint(0));
+      }
+
       doEnqueueSlotChange = true;
     }
 
@@ -262,6 +293,13 @@ ShadowRoot::InsertSheet(StyleSheet* aSheet,
     }
 
     nsINode* sheetOwningNode = SheetAt(i)->GetOwnerNode();
+    
+    if (!sheetOwningNode) {
+      // Keep moving; all sheets with a sheetOwner come after all
+      // sheets without an owning Node
+      continue;
+    }
+    
     if (nsContentUtils::PositionIsBefore(aLinkingContent, sheetOwningNode)) {
       InsertSheetAt(i, *aSheet);
       mProtoBinding->InsertStyleSheetAt(i, aSheet);
@@ -311,6 +349,8 @@ ShadowRoot::GetEventTargetParent(EventChainPreVisitor& aVisitor)
 {
   aVisitor.mCanHandle = true;
   aVisitor.mRootOfClosedTree = IsClosed();
+  // Inform that we're about to exit the current scope.
+  aVisitor.mRelatedTargetRetargetedInCurrentScope = false;
 
   // https://dom.spec.whatwg.org/#ref-for-get-the-parent%E2%91%A6
   if (!aVisitor.mEvent->mFlags.mComposed) {
@@ -333,12 +373,10 @@ ShadowRoot::GetEventTargetParent(EventChainPreVisitor& aVisitor)
   nsIContent* shadowHost = GetHost();
   aVisitor.SetParentTarget(shadowHost, false);
 
-  if (aVisitor.mOriginalTargetIsInAnon) {
-    nsCOMPtr<nsIContent> content(do_QueryInterface(aVisitor.mEvent->mTarget));
-    if (content && content->GetBindingParent() == shadowHost) {
-      aVisitor.mEventTargetAtParent = shadowHost;
-    }
- }
+  nsCOMPtr<nsIContent> content(do_QueryInterface(aVisitor.mEvent->mTarget));
+  if (content && content->GetBindingParent() == shadowHost) {
+    aVisitor.mEventTargetAtParent = shadowHost;
+  }
 
   return NS_OK;
 }
@@ -488,25 +526,6 @@ ShadowRoot::Host()
   return host->AsElement();
 }
 
-bool
-ShadowRoot::ApplyAuthorStyles()
-{
-  return mProtoBinding->InheritsStyle();
-}
-
-void
-ShadowRoot::SetApplyAuthorStyles(bool aApplyAuthorStyles)
-{
-  mProtoBinding->SetInheritsStyle(aApplyAuthorStyles);
-
-  nsIPresShell* shell = OwnerDoc()->GetShell();
-  if (shell) {
-    OwnerDoc()->BeginUpdate(UPDATE_STYLE);
-    shell->RecordShadowStyleChange(this);
-    OwnerDoc()->EndUpdate(UPDATE_STYLE);
-  }
-}
-
 void
 ShadowRoot::AttributeChanged(nsIDocument* aDocument,
                              Element* aElement,
@@ -580,6 +599,13 @@ ShadowRoot::ContentInserted(nsIDocument* aDocument,
   if (slot && slot->GetContainingShadow() == this &&
       slot->AssignedNodes().IsEmpty()) {
     slot->EnqueueSlotChangeEvent();
+    return;
+  }
+  
+  // XXX: The following makes the host destroy its frames and force a
+  // restyle for cases where the content isn't slotted.
+  if (aContainer == this) {
+    DistributionChanged();
   }
 }
 
@@ -616,6 +642,13 @@ ShadowRoot::ContentRemoved(nsIDocument* aDocument,
   if (slot && slot->GetContainingShadow() == this &&
       slot->AssignedNodes().IsEmpty()) {
     slot->EnqueueSlotChangeEvent();
+    return;
+  }
+
+  // XXX: The following makes the host destroy its frames and force a
+  // restyle for cases where the content isn't slotted.
+  if (aContainer == this) {
+    DistributionChanged();
   }
 }
 

dom/base/ShadowRoot.h

@@ -59,13 +59,16 @@ public:
   // [deprecated] Shadow DOM v0
   void InsertSheet(StyleSheet* aSheet, nsIContent* aLinkingContent);
   void RemoveSheet(StyleSheet* aSheet);
-  bool ApplyAuthorStyles();
-  void SetApplyAuthorStyles(bool aApplyAuthorStyles);
   StyleSheetList* StyleSheets()
   {
     return &DocumentOrShadowRoot::EnsureDOMStyleSheets();
   }
 
+  /**
+   * Clones internal state, for example stylesheets, of aOther to 'this'.
+   */
+  void CloneInternalDataFrom(ShadowRoot* aOther);
+
   /**
    * Distributes all the explicit children of the pool host to the content
    * insertion points in this ShadowRoot.

dom/base/WebSocket.cpp

@@ -1402,32 +1402,6 @@ WebSocket::ConstructorCommon(const GlobalObject& aGlobal,
 
 NS_IMPL_CYCLE_COLLECTION_CLASS(WebSocket)
 
-NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(WebSocket)
-  bool isBlack = tmp->IsBlack();
-  if (isBlack || tmp->mKeepingAlive) {
-    if (tmp->mListenerManager) {
-      tmp->mListenerManager->MarkForCC();
-    }
-    if (!isBlack && tmp->PreservingWrapper()) {
-      // This marks the wrapper black.
-      tmp->GetWrapper();
-    }
-    return true;
-  }
-NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
-
-NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(WebSocket)
-  return tmp->IsBlack();
-NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
-
-NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(WebSocket)
-  return tmp->IsBlack();
-NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
-
-NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(WebSocket,
-                                               DOMEventTargetHelper)
-NS_IMPL_CYCLE_COLLECTION_TRACE_END
-
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(WebSocket,
                                                   DOMEventTargetHelper)
   if (tmp->mImpl) {
@@ -1444,6 +1418,12 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(WebSocket,
   }
 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
 
+bool
+WebSocket::IsCertainlyAliveForCC() const
+{
+  return mKeepingAlive;
+}
+
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(WebSocket)
 NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
 

dom/base/WebSocket.h

@@ -45,8 +45,8 @@ public:
 
 public:
   NS_DECL_ISUPPORTS_INHERITED
-  NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_INHERITED(
-    WebSocket, DOMEventTargetHelper)
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(WebSocket, DOMEventTargetHelper)
+  virtual bool IsCertainlyAliveForCC() const override;
 
   // EventTarget
   virtual void EventListenerAdded(nsIAtom* aType) override;

dom/base/crashtests/1024428-1.html

@@ -5,8 +5,7 @@
 <body>
 <div id="host"></div>
 <script>
-var s = host.createShadowRoot();
-s.innerHTML = '<input type="range" />';
+host.attachShadow({ mode: "open" }).innerHTML = '<input type="range" />';
 </script>
 </body>
 </html>

dom/base/crashtests/1029710.html

@@ -3,7 +3,7 @@
 <body>
 <script>
   var x = document.createElement('span');
-  x.createShadowRoot();
+  x.attachShadow({ mode: "open" });
   x.id = 'a';
 </script>
 </body>

dom/base/crashtests/1118764.html

@@ -1,33 +0,0 @@
-<!DOCTYPE html>
-<html>
-<body>
-<style>
-#foo {
-  overflow: scroll;
-  height: 100px;
-}
-</style>
-<div id="foo">
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-Mozilla Firefox<br>
-<script>
-foo.createShadowRoot().innerHTML = "<content></content>";
-</script>
-</body>
-</html>

dom/base/crashtests/1393806.html

@@ -0,0 +1,17 @@
+<html>
+  <head>
+    <script>
+      function fun_0() {
+        document.implementation.createDocument('', '', null).adoptNode(o2);
+      }
+
+      o1 = document.createElement('map');
+      o2 = document.createElement('iframe');
+      document.documentElement.appendChild(o1);
+      document.documentElement.appendChild(o2);
+      o1.textContent = 'x';
+      document.addEventListener('DOMNodeRemoved', fun_0, false);
+      o1.innerText = 'x';
+    </script>
+  </head>
+</html>

dom/base/crashtests/crashtests.list

@@ -209,6 +209,7 @@ load 1230422.html
 load 1251361.html
 load 1304437.html
 pref(clipboard.autocopy,true) load 1385272-1.html
+load 1393806.html
 pref(dom.webcomponents.enabled,true) load 1341693.html
 pref(dom.webcomponents.enabled,true) load 1419799.html
 pref(dom.webcomponents.enabled,false) load 1422931.html

dom/base/moz.build

@@ -222,7 +222,7 @@ EXPORTS.mozilla.dom += [
     'WindowOrientationObserver.h',
 ]
 
-SOURCES += [
+UNIFIED_SOURCES += [
     'AnonymousContent.cpp',
     'Attr.cpp',
     'BarProps.cpp',
@@ -238,7 +238,6 @@ SOURCES += [
     'DirectionalityUtils.cpp',
     'DocGroup.cpp',
     'DocumentFragment.cpp',
-    'DocumentOrShadowRoot.cpp',
     'DocumentType.cpp',
     'DOMCursor.cpp',
     'DOMError.cpp',
@@ -373,12 +372,14 @@ SOURCES += [
 ]
 
 if CONFIG['MOZ_WEBRTC']:
-    SOURCES += [
+    UNIFIED_SOURCES += [
         'nsDOMDataChannel.cpp',
     ]
 
 # these files couldn't be in UNIFIED_SOURCES for now for reasons given below:
 SOURCES += [
+    # DocumentOrShadowRoot conflicts with mozilla::dom::ShadowRoot
+    'DocumentOrShadowRoot.cpp',
     # Several conflicts with other bindings.
     'DOMIntersectionObserver.cpp',
     # Because of OS X headers.

dom/base/nsContentUtils.cpp

@@ -2248,6 +2248,34 @@ nsContentUtils::ContentIsHostIncludingDescendantOf(
   return false;
 }
 
+bool
+nsContentUtils::ContentIsShadowIncludingDescendantOf(
+  const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor)
+{
+  MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
+  MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
+
+  if (aPossibleAncestor == aPossibleDescendant->GetComposedDoc()) {
+    return true;
+  }
+
+  do {
+    if (aPossibleDescendant == aPossibleAncestor) {
+      return true;
+    }
+
+    if (aPossibleDescendant->NodeType() == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
+      ShadowRoot* shadowRoot =
+        ShadowRoot::FromNode(const_cast<nsINode*>(aPossibleDescendant));
+      aPossibleDescendant = shadowRoot ? shadowRoot->GetHost() : nullptr;
+    } else {
+      aPossibleDescendant = aPossibleDescendant->GetParentNode();
+    }
+  } while (aPossibleDescendant);
+
+  return false;
+}
+
 // static
 bool
 nsContentUtils::ContentIsCrossDocDescendantOf(nsINode* aPossibleDescendant,
@@ -2266,6 +2294,30 @@ nsContentUtils::ContentIsCrossDocDescendantOf(nsINode* aPossibleDescendant,
   return false;
 }
 
+// static
+nsINode*
+nsContentUtils::Retarget(nsINode* aTargetA, nsINode* aTargetB)
+{
+  while (true && aTargetA) {
+    // If A's root is not a shadow root...
+    nsINode* root = aTargetA->SubtreeRoot();
+    // TODO: replace with IsShadowRoot() check once bug 1427511 lands.
+    if (!ShadowRoot::FromNode(root)) {
+      // ...then return A.
+      return aTargetA;
+    }
+
+    // or A's root is a shadow-including inclusive ancestor of B...
+    if (nsContentUtils::ContentIsShadowIncludingDescendantOf(aTargetB, root)) {
+      // ...then return A.
+      return aTargetA;
+    }
+
+    aTargetA = ShadowRoot::FromNode(root)->GetHost();
+  }
+
+  return nullptr;
+}
 
 // static
 nsresult
@@ -2377,6 +2429,56 @@ nsContentUtils::GetCommonAncestor(nsINode* aNode1,
   return parent;
 }
 
+// static
+nsINode*
+nsContentUtils::GetCommonAncestorUnderInteractiveContent(nsINode* aNode1,
+                                                         nsINode* aNode2)
+{
+  if (!aNode1 || !aNode2) {
+    return nullptr;
+  }
+
+  if (aNode1 == aNode2) {
+    return aNode1;
+  }
+
+  // Build the chain of parents
+  AutoTArray<nsINode*, 30> parents1;
+  do {
+    parents1.AppendElement(aNode1);
+    if (aNode1->IsElement() &&
+        aNode1->AsElement()->IsInteractiveHTMLContent(true)) {
+      break;
+    }
+    aNode1 = aNode1->GetFlattenedTreeParentNode();
+  } while (aNode1);
+
+  AutoTArray<nsINode*, 30> parents2;
+  do {
+    parents2.AppendElement(aNode2);
+    if (aNode2->IsElement() &&
+        aNode2->AsElement()->IsInteractiveHTMLContent(true)) {
+      break;
+    }
+    aNode2 = aNode2->GetFlattenedTreeParentNode();
+  } while (aNode2);
+
+  // Find where the parent chain differs
+  uint32_t pos1 = parents1.Length();
+  uint32_t pos2 = parents2.Length();
+  nsINode* parent = nullptr;
+  for (uint32_t len = std::min(pos1, pos2); len > 0; --len) {
+    nsINode* child1 = parents1.ElementAt(--pos1);
+    nsINode* child2 = parents2.ElementAt(--pos2);
+    if (child1 != child2) {
+      break;
+    }
+    parent = child1;
+  }
+
+  return parent;
+}
+
 /* static */
 bool
 nsContentUtils::PositionIsBefore(nsINode* aNode1, nsINode* aNode2)
@@ -6332,9 +6434,7 @@ nsContentUtils::IsFocusedContent(const nsIContent* aContent)
 bool
 nsContentUtils::IsSubDocumentTabbable(nsIContent* aContent)
 {
-  //XXXsmaug Shadow DOM spec issue!
-  //         We may need to change this to GetComposedDoc().
-  nsIDocument* doc = aContent->GetUncomposedDoc();
+  nsIDocument* doc = aContent->GetComposedDoc();
   if (!doc) {
     return false;
   }
@@ -7056,16 +7156,26 @@ nsContentUtils::HasDistributedChildren(nsIContent* aContent)
 
 // static
 bool
-nsContentUtils::IsForbiddenRequestHeader(const nsACString& aHeader)
+nsContentUtils::IsForbiddenRequestHeader(const nsACString& aHeader,
+                                         const nsACString& aValue)
 {
   if (IsForbiddenSystemRequestHeader(aHeader)) {
     return true;
   }
+  
+  if ((nsContentUtils::IsOverrideMethodHeader(aHeader) &&
+       nsContentUtils::ContainsForbiddenMethod(aValue))) {
+    return true;
+  }
 
-  return StringBeginsWith(aHeader, NS_LITERAL_CSTRING("proxy-"),
-                          nsCaseInsensitiveCStringComparator()) ||
-         StringBeginsWith(aHeader, NS_LITERAL_CSTRING("sec-"),
-                          nsCaseInsensitiveCStringComparator());
+  if (StringBeginsWith(aHeader, NS_LITERAL_CSTRING("proxy-"),
+                       nsCaseInsensitiveCStringComparator()) ||
+      StringBeginsWith(aHeader, NS_LITERAL_CSTRING("sec-"),
+                       nsCaseInsensitiveCStringComparator())) {
+    return true;
+  }
+  
+  return false;
 }
 
 // static
@@ -7094,6 +7204,64 @@ nsContentUtils::IsForbiddenResponseHeader(const nsACString& aHeader)
           aHeader.LowerCaseEqualsASCII("set-cookie2"));
 }
 
+// static 
+bool
+nsContentUtils::IsOverrideMethodHeader(const nsACString& headerName) {
+  return headerName.LowerCaseEqualsASCII("x-http-method-override") ||
+         headerName.LowerCaseEqualsASCII("x-http-method") ||
+         headerName.LowerCaseEqualsASCII("x-method-override");
+}
+
+// static
+bool
+nsContentUtils::ContainsForbiddenMethod(const nsACString& headerValue) {
+  bool hasInsecureMethod = false;
+  nsCCharSeparatedTokenizer tokenizer(headerValue, ',');
+
+  while (tokenizer.hasMoreTokens()) {
+    const nsDependentCSubstring& value = tokenizer.nextToken();
+
+    if (value.LowerCaseEqualsASCII("connect") ||
+        value.LowerCaseEqualsASCII("trace") ||
+        value.LowerCaseEqualsASCII("track")) {
+      hasInsecureMethod = true;
+      break;
+    }
+  }
+
+  return hasInsecureMethod;
+}
+
+// static
+bool nsContentUtils::IsCorsUnsafeRequestHeaderValue(
+    const nsACString& aHeaderValue) {
+  const char* cur = aHeaderValue.BeginReading();
+  const char* end = aHeaderValue.EndReading();
+
+  while (cur != end) {
+    // Implementation of
+    // https://fetch.spec.whatwg.org/#cors-unsafe-request-header-byte Is less
+    // than a space but not a horizontal tab
+    if ((*cur < ' ' && *cur != '\t') || *cur == '"' || *cur == '(' ||
+        *cur == ')' || *cur == ':' || *cur == '<' || *cur == '>' ||
+        *cur == '?' || *cur == '@' || *cur == '[' || *cur == '\\' ||
+        *cur == ']' || *cur == '{' || *cur == '}' ||
+        *cur == 0x7F) {  // 0x75 is DEL
+      return true;
+    }
+    cur++;
+  }
+  return false;
+}
+
+// static
+bool nsContentUtils::IsAllowedNonCorsAccept(const nsACString& aHeaderValue) {
+  if (IsCorsUnsafeRequestHeaderValue(aHeaderValue)) {
+    return false;
+  }
+  return true;
+}
+
 // static
 bool
 nsContentUtils::IsAllowedNonCorsContentType(const nsACString& aHeaderValue)
@@ -7101,6 +7269,10 @@ nsContentUtils::IsAllowedNonCorsContentType(const nsACString& aHeaderValue)
   nsAutoCString contentType;
   nsAutoCString unused;
 
+  if (IsCorsUnsafeRequestHeaderValue(aHeaderValue)) {
+    return false;
+  }
+
   nsresult rv = NS_ParseRequestContentType(aHeaderValue, contentType, unused);
   if (NS_FAILED(rv)) {
     return false;
@@ -7111,6 +7283,41 @@ nsContentUtils::IsAllowedNonCorsContentType(const nsACString& aHeaderValue)
          contentType.LowerCaseEqualsLiteral("multipart/form-data");
 }
 
+// static
+bool nsContentUtils::IsAllowedNonCorsLanguage(const nsACString& aHeaderValue) {
+  const char* cur = aHeaderValue.BeginReading();
+  const char* end = aHeaderValue.EndReading();
+
+  while (cur != end) {
+    if ((*cur >= '0' && *cur <= '9') || (*cur >= 'A' && *cur <= 'Z') ||
+        (*cur >= 'a' && *cur <= 'z') || *cur == ' ' || *cur == '*' ||
+        *cur == ',' || *cur == '-' || *cur == '.' || *cur == ';' ||
+        *cur == '=') {
+      cur++;
+      continue;
+    }
+    return false;
+  }
+  return true;
+}
+
+// static
+bool nsContentUtils::IsCORSSafelistedRequestHeader(const nsACString& aName,
+                                                   const nsACString& aValue) {
+  // See https://fetch.spec.whatwg.org/#cors-safelisted-request-header
+  if (aValue.Length() > 128) {
+    return false;
+  }
+  return (aName.LowerCaseEqualsLiteral("accept") &&
+          nsContentUtils::IsAllowedNonCorsAccept(aValue)) ||
+         (aName.LowerCaseEqualsLiteral("accept-language") &&
+          nsContentUtils::IsAllowedNonCorsLanguage(aValue)) ||
+         (aName.LowerCaseEqualsLiteral("content-language") &&
+          nsContentUtils::IsAllowedNonCorsLanguage(aValue)) ||
+         (aName.LowerCaseEqualsLiteral("content-type") &&
+          nsContentUtils::IsAllowedNonCorsContentType(aValue));
+}
+
 bool
 nsContentUtils::DOMWindowDumpEnabled()
 {

dom/base/nsContentUtils.h

@@ -279,6 +279,13 @@ public:
   static bool ContentIsHostIncludingDescendantOf(
     const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor);
 
+  /**
+   * Similar to above, but does special case only ShadowRoot,
+   * not HTMLTemplateElement.
+   */
+  static bool ContentIsShadowIncludingDescendantOf(
+    const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor);
+
   /**
    * Similar to ContentIsDescendantOf except it crosses document boundaries,
    * this function uses ancestor/descendant relations in the composed document
@@ -287,6 +294,13 @@ public:
   static bool ContentIsCrossDocDescendantOf(nsINode* aPossibleDescendant,
                                               nsINode* aPossibleAncestor);
 
+  /**
+   * Retarget an object A against an object B
+   * @see https://dom.spec.whatwg.org/#retarget
+   */
+  static nsINode*
+  Retarget(nsINode* aTargetA, nsINode* aTargetB);
+
   /*
    * This method fills the |aArray| with all ancestor nodes of |aNode|
    * including |aNode| at the zero index.
@@ -324,6 +338,15 @@ public:
   static nsINode* GetCommonAncestor(nsINode* aNode1,
                                     nsINode* aNode2);
 
+  /**
+   * Returns the common ancestor under interactive content, if any.
+   * If neither one has interactive content as ancestor, common ancestor will be
+   * returned. If only one has interactive content as ancestor, null will be
+   * returned. If the nodes are the same, that node is returned.
+   */
+  static nsINode* GetCommonAncestorUnderInteractiveContent(nsINode* aNode1,
+                                                           nsINode* aNode2);
+
   /**
    * Returns true if aNode1 is before aNode2 in the same connected
    * tree.
@@ -2425,7 +2448,8 @@ public:
    * Returns whether a given header is forbidden for an XHR or fetch
    * request.
    */
-  static bool IsForbiddenRequestHeader(const nsACString& aHeader);
+  static bool IsForbiddenRequestHeader(const nsACString& aHeader,
+                                       const nsACString& aValue);
 
   /**
    * Returns whether a given header is forbidden for a system XHR
@@ -2433,18 +2457,50 @@ public:
    */
   static bool IsForbiddenSystemRequestHeader(const nsACString& aHeader);
 
+  /**
+   * Returns whether a given header has characters that aren't permitted
+   */
+  static bool IsCorsUnsafeRequestHeaderValue(const nsACString& aHeaderValue);
+
+  /**
+   * Returns whether a given Accept header value is allowed
+   * for a non-CORS XHR or fetch request.
+   */
+  static bool IsAllowedNonCorsAccept(const nsACString& aHeaderValue);
+
   /**
    * Returns whether a given Content-Type header value is allowed
    * for a non-CORS XHR or fetch request.
    */
   static bool IsAllowedNonCorsContentType(const nsACString& aHeaderValue);
 
+  /**
+   * Returns whether a given Content-Language or accept-language header value is
+   * allowed for a non-CORS XHR or fetch request.
+   */
+  static bool IsAllowedNonCorsLanguage(const nsACString& aHeaderValue);
+ 
+  /**
+   * Returns whether a given header and value is a CORS-safelisted request
+   * header per https://fetch.spec.whatwg.org/#cors-safelisted-request-header
+   */
+  static bool IsCORSSafelistedRequestHeader(const nsACString& aName,
+                                            const nsACString& aValue);
+
   /**
    * Returns whether a given header is forbidden for an XHR or fetch
    * response.
    */
   static bool IsForbiddenResponseHeader(const nsACString& aHeader);
 
+  /**
+   * Checks whether the header overrides any http methods
+   */
+  static bool IsOverrideMethodHeader(const nsACString& headerName);
+  /**
+   * Checks whether the  header value contains any forbidden method
+   */
+  static bool ContainsForbiddenMethod(const nsACString& headerValue);
   /**
    * Returns the inner window ID for the window associated with a request,
    */

dom/base/nsDOMWindowUtils.cpp

@@ -2367,75 +2367,6 @@ nsDOMWindowUtils::GetCurrentAudioBackend(nsAString& aBackend)
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsDOMWindowUtils::StartFrameTimeRecording(uint32_t *startIndex)
-{
-  NS_ENSURE_ARG_POINTER(startIndex);
-
-  nsCOMPtr<nsIWidget> widget = GetWidget();
-  if (!widget)
-    return NS_ERROR_FAILURE;
-
-  LayerManager *mgr = widget->GetLayerManager();
-  if (!mgr)
-    return NS_ERROR_FAILURE;
-
-  const uint32_t kRecordingMinSize = 60 * 10; // 10 seconds @60 fps.
-  const uint32_t kRecordingMaxSize = 60 * 60 * 60; // One hour
-  uint32_t bufferSize = Preferences::GetUint("toolkit.framesRecording.bufferSize", uint32_t(0));
-  bufferSize = std::min(bufferSize, kRecordingMaxSize);
-  bufferSize = std::max(bufferSize, kRecordingMinSize);
-  *startIndex = mgr->StartFrameTimeRecording(bufferSize);
-
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-nsDOMWindowUtils::StopFrameTimeRecording(uint32_t   startIndex,
-                                         uint32_t  *frameCount,
-                                         float    **frameIntervals)
-{
-  NS_ENSURE_ARG_POINTER(frameCount);
-  NS_ENSURE_ARG_POINTER(frameIntervals);
-
-  nsCOMPtr<nsIWidget> widget = GetWidget();
-  if (!widget)
-    return NS_ERROR_FAILURE;
-
-  LayerManager *mgr = widget->GetLayerManager();
-  if (!mgr)
-    return NS_ERROR_FAILURE;
-
-  nsTArray<float> tmpFrameIntervals;
-  mgr->StopFrameTimeRecording(startIndex, tmpFrameIntervals);
-  *frameCount = tmpFrameIntervals.Length();
-
-  *frameIntervals = (float*)moz_xmalloc(*frameCount * sizeof(float));
-
-  /* copy over the frame intervals and paint times into the arrays we just allocated */
-  for (uint32_t i = 0; i < *frameCount; i++) {
-    (*frameIntervals)[i] = tmpFrameIntervals[i];
-  }
-
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-nsDOMWindowUtils::BeginTabSwitch()
-{
-  nsCOMPtr<nsIWidget> widget = GetWidget();
-  if (!widget)
-    return NS_ERROR_FAILURE;
-
-  LayerManager *mgr = widget->GetLayerManager();
-  if (!mgr)
-    return NS_ERROR_FAILURE;
-
-  mgr->BeginTabSwitch();
-
-  return NS_OK;
-}
-
 static bool
 ComputeAnimationValue(nsCSSPropertyID aProperty,
                       Element* aElement,
@@ -2478,7 +2409,7 @@ nsDOMWindowUtils::AdvanceTimeAndRefresh(int64_t aMilliseconds)
 
   nsPresContext* presContext = GetPresContext();
   if (presContext) {
-    nsRefreshDriver* driver = presContext->RefreshDriver();
+    RefPtr<nsRefreshDriver> driver = presContext->RefreshDriver();
     driver->AdvanceTimeAndRefresh(aMilliseconds);
 
     RefPtr<LayerTransactionChild> transaction = GetLayerTransaction();

dom/base/nsDocument.cpp

@@ -2504,6 +2504,21 @@ nsDocument::InitCSP(nsIChannel* aChannel)
     return NS_OK;
   }
 
+  // If this is explicitly loaded as a data document, no need to set a CSP.
+  if (mLoadedAsData) {
+    return NS_OK;
+  }
+  
+  // If this is an image, no need to set a CSP.
+  // If we don't do this, SVG images will be parsed as normal XML documents and
+  // subject to served CSPs, which might block internally applied inline styles.
+  // See UXP issue #1959.
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo();
+  if (loadInfo->GetExternalContentPolicyType() ==
+      nsIContentPolicy::TYPE_IMAGE) {
+    return NS_OK;
+  }
+
   nsAutoCString tCspHeaderValue, tCspROHeaderValue;
 
   nsCOMPtr<nsIHttpChannel> httpChannel;
@@ -2532,7 +2547,6 @@ nsDocument::InitCSP(nsIChannel* aChannel)
 
   // Check if this is a signed content to apply default CSP.
   bool applySignedContentCSP = false;
-  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo();
   if (loadInfo && loadInfo->GetVerifySignedContent()) {
     applySignedContentCSP = true;
   }
@@ -3106,106 +3120,6 @@ nsDocument::ElementFromPoint(float aX, float aY, nsIDOMElement** aReturn)
   return NS_OK;
 }
 
-Element*
-nsIDocument::ElementFromPoint(float aX, float aY)
-{
-  return ElementFromPointHelper(aX, aY, false, true);
-}
-
-void
-nsIDocument::ElementsFromPoint(float aX, float aY,
-                               nsTArray<RefPtr<Element>>& aElements)
-{
-  ElementsFromPointHelper(aX, aY, nsIDocument::FLUSH_LAYOUT, aElements);
-}
-
-Element*
-nsDocument::ElementFromPointHelper(float aX, float aY,
-                                   bool aIgnoreRootScrollFrame,
-                                   bool aFlushLayout)
-{
-  AutoTArray<RefPtr<Element>, 1> elementArray;
-  ElementsFromPointHelper(aX, aY,
-                          ((aIgnoreRootScrollFrame ? nsIDocument::IGNORE_ROOT_SCROLL_FRAME : 0) |
-                           (aFlushLayout ? nsIDocument::FLUSH_LAYOUT : 0) |
-                           nsIDocument::IS_ELEMENT_FROM_POINT),
-                          elementArray);
-  if (elementArray.IsEmpty()) {
-    return nullptr;
-  }
-  return elementArray[0];
-}
-
-void
-nsDocument::ElementsFromPointHelper(float aX, float aY,
-                                    uint32_t aFlags,
-                                    nsTArray<RefPtr<mozilla::dom::Element>>& aElements)
-{
-  // As per the the spec, we return null if either coord is negative
-  if (!(aFlags & nsIDocument::IGNORE_ROOT_SCROLL_FRAME) && (aX < 0 || aY < 0)) {
-    return;
-  }
-
-  nscoord x = nsPresContext::CSSPixelsToAppUnits(aX);
-  nscoord y = nsPresContext::CSSPixelsToAppUnits(aY);
-  nsPoint pt(x, y);
-
-  // Make sure the layout information we get is up-to-date, and
-  // ensure we get a root frame (for everything but XUL)
-  if (aFlags & nsIDocument::FLUSH_LAYOUT) {
-    FlushPendingNotifications(Flush_Layout);
-  }
-
-  nsIPresShell *ps = GetShell();
-  if (!ps) {
-    return;
-  }
-  nsIFrame *rootFrame = ps->GetRootFrame();
-
-  // XUL docs, unlike HTML, have no frame tree until everything's done loading
-  if (!rootFrame) {
-    return; // return null to premature XUL callers as a reminder to wait
-  }
-
-  nsTArray<nsIFrame*> outFrames;
-  // Emulate what GetFrameAtPoint does, since we want all the frames under our
-  // point.
-  nsLayoutUtils::GetFramesForArea(rootFrame, nsRect(pt, nsSize(1, 1)), outFrames,
-    nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC |
-    ((aFlags & nsIDocument::IGNORE_ROOT_SCROLL_FRAME) ? nsLayoutUtils::IGNORE_ROOT_SCROLL_FRAME : 0));
-
-  // Dunno when this would ever happen, as we should at least have a root frame under us?
-  if (outFrames.IsEmpty()) {
-    return;
-  }
-
-  // Used to filter out repeated elements in sequence.
-  nsIContent* lastAdded = nullptr;
-
-  for (uint32_t i = 0; i < outFrames.Length(); i++) {
-    nsIContent* node = GetContentInThisDocument(outFrames[i]);
-
-    if (!node || !node->IsElement()) {
-      // If this helper is called via ElementsFromPoint, we need to make sure
-      // our frame is an element. Otherwise return whatever the top frame is
-      // even if it isn't the top-painted element.
-      if (!(aFlags & nsIDocument::IS_ELEMENT_FROM_POINT)) {
-        continue;
-      }
-      node = node->GetParent();
-    }
-    if (node && node != lastAdded) {
-      aElements.AppendElement(node->AsElement());
-      lastAdded = node;
-      // If this helper is called via ElementFromPoint, just return the first
-      // element we find.
-      if (aFlags & nsIDocument::IS_ELEMENT_FROM_POINT) {
-        return;
-      }
-    }
-  }
-}
-
 nsresult
 nsDocument::NodesFromRectHelper(float aX, float aY,
                                 float aTopSize, float aRightSize,
@@ -5909,14 +5823,9 @@ nsIDocument::ImportNode(nsINode& aNode, bool aDeep, ErrorResult& rv) const
     case nsIDOMNode::COMMENT_NODE:
     case nsIDOMNode::DOCUMENT_TYPE_NODE:
     {
-      nsCOMPtr<nsINode> newNode;
       nsCOMArray<nsINode> nodesWithProperties;
-      rv = nsNodeUtils::Clone(imported, aDeep, mNodeInfoManager,
-                              nodesWithProperties, getter_AddRefs(newNode));
-      if (rv.Failed()) {
-        return nullptr;
-      }
-      return newNode.forget();
+      return nsNodeUtils::Clone(imported, aDeep, mNodeInfoManager,
+                                &nodesWithProperties, rv);
     }
     default:
     {
@@ -7077,8 +6986,8 @@ nsIDocument::AdoptNode(nsINode& aAdoptedNode, ErrorResult& rv)
   }
 
   nsCOMArray<nsINode> nodesWithProperties;
-  rv = nsNodeUtils::Adopt(adoptedNode, sameDocument ? nullptr : mNodeInfoManager,
-                          newScope, nodesWithProperties);
+  nsNodeUtils::Adopt(adoptedNode, sameDocument ? nullptr : mNodeInfoManager,
+                     newScope, nodesWithProperties, rv);
   if (rv.Failed()) {
     // Disconnect all nodes from their parents, since some have the old document
     // as their ownerDocument and some have this as their ownerDocument.
@@ -8373,7 +8282,7 @@ nsDocument::DoUnblockOnload()
 }
 
 nsIContent*
-nsDocument::GetContentInThisDocument(nsIFrame* aFrame) const
+nsIDocument::GetContentInThisDocument(nsIFrame* aFrame) const
 {
   for (nsIFrame* f = aFrame; f;
        f = nsLayoutUtils::GetParentOrPlaceholderForCrossDoc(f)) {
@@ -8584,7 +8493,7 @@ nsDocument::OnPageHide(bool aPersisted,
   EnumerateActivityObservers(NotifyActivityChanged, nullptr);
 
   ClearPendingFullscreenRequests(this);
-  if (GetFullscreenElement()) {
+  if (FullScreenStackTop()) {
     // If this document was fullscreen, we should exit fullscreen in this
     // doctree branch. This ensures that if the user navigates while in
     // fullscreen mode we don't leave its still visible ancestor documents
@@ -10288,7 +10197,7 @@ nsIDocument::AsyncExitFullscreen(nsIDocument* aDoc)
 static bool
 CountFullscreenSubDocuments(nsIDocument* aDoc, void* aData)
 {
-  if (aDoc->GetFullscreenElement()) {
+  if (aDoc->FullScreenStackTop()) {
     uint32_t* count = static_cast<uint32_t*>(aData);
     (*count)++;
   }
@@ -10308,7 +10217,7 @@ nsDocument::IsFullscreenLeaf()
 {
   // A fullscreen leaf document is fullscreen, and has no fullscreen
   // subdocuments.
-  if (!GetFullscreenElement()) {
+  if (!FullScreenStackTop()) {
     return false;
   }
   return CountFullscreenSubDocuments(this) == 0;
@@ -10317,11 +10226,11 @@ nsDocument::IsFullscreenLeaf()
 static bool
 ResetFullScreen(nsIDocument* aDocument, void* aData)
 {
-  if (aDocument->GetFullscreenElement()) {
+  if (aDocument->FullScreenStackTop()) {
     NS_ASSERTION(CountFullscreenSubDocuments(aDocument) <= 1,
         "Should have at most 1 fullscreen subdocument.");
     static_cast<nsDocument*>(aDocument)->CleanupFullscreenState();
-    NS_ASSERTION(!aDocument->GetFullscreenElement(),
+    NS_ASSERTION(!aDocument->FullScreenStackTop(),
                  "Should reset full-screen");
     auto changed = reinterpret_cast<nsCOMArray<nsIDocument>*>(aData);
     changed->AppendElement(aDocument);
@@ -10369,7 +10278,7 @@ nsIDocument::ExitFullscreenInDocTree(nsIDocument* aMaybeNotARootDoc)
   UnlockPointer();
 
   nsCOMPtr<nsIDocument> root = aMaybeNotARootDoc->GetFullscreenRoot();
-  if (!root || !root->GetFullscreenElement()) {
+  if (!root || !root->FullScreenStackTop()) {
     // If a document was detached before exiting from fullscreen, it is
     // possible that the root had left fullscreen state. In this case,
     // we would not get anything from the ResetFullScreen() call. Root's
@@ -10398,7 +10307,7 @@ nsIDocument::ExitFullscreenInDocTree(nsIDocument* aMaybeNotARootDoc)
     DispatchFullScreenChange(changed[changed.Length() - i - 1]);
   }
 
-  NS_ASSERTION(!root->GetFullscreenElement(),
+  NS_ASSERTION(!root->FullScreenStackTop(),
     "Fullscreen root should no longer be a fullscreen doc...");
 
   // Move the top-level window out of fullscreen mode.
@@ -10415,7 +10324,7 @@ GetFullscreenLeaf(nsIDocument* aDoc, void* aData)
     nsIDocument** result = static_cast<nsIDocument**>(aData);
     *result = aDoc;
     return false;
-  } else if (aDoc->GetFullscreenElement()) {
+  } else if (aDoc->FullScreenStackTop()) {
     aDoc->EnumerateSubDocuments(GetFullscreenLeaf, aData);
   }
   return true;
@@ -10434,7 +10343,7 @@ GetFullscreenLeaf(nsIDocument* aDoc)
   nsIDocument* root = nsContentUtils::GetRootDocument(aDoc);
   // Check that the root is actually fullscreen so we don't waste time walking
   // around its descendants.
-  if (!root->GetFullscreenElement()) {
+  if (!root->FullScreenStackTop()) {
     return nullptr;
   }
   GetFullscreenLeaf(root, &leaf);
@@ -10444,10 +10353,10 @@ GetFullscreenLeaf(nsIDocument* aDoc)
 void
 nsDocument::RestorePreviousFullScreenState()
 {
-  NS_ASSERTION(!GetFullscreenElement() || !FullscreenRoots::IsEmpty(),
+  NS_ASSERTION(!FullScreenStackTop() || !FullscreenRoots::IsEmpty(),
     "Should have at least 1 fullscreen root when fullscreen!");
 
-  if (!GetFullscreenElement() || !GetWindow() || FullscreenRoots::IsEmpty()) {
+  if (!FullScreenStackTop() || !GetWindow() || FullscreenRoots::IsEmpty()) {
     return;
   }
 
@@ -10622,7 +10531,7 @@ nsDocument::FullScreenStackPush(Element* aElement)
   }
   EventStateManager::SetFullScreenState(aElement, true);
   mFullScreenStack.AppendElement(do_GetWeakReference(aElement));
-  NS_ASSERTION(GetFullscreenElement() == aElement, "Should match");
+  NS_ASSERTION(FullScreenStackTop() == aElement, "Should match");
   UpdateViewportScrollbarOverrideForFullscreen(this);
   return true;
 }
@@ -10670,7 +10579,7 @@ nsDocument::FullScreenStackTop()
   uint32_t last = mFullScreenStack.Length() - 1;
   nsCOMPtr<Element> element(do_QueryReferent(mFullScreenStack[last]));
   NS_ASSERTION(element, "Should have full-screen element!");
-  NS_ASSERTION(element->IsInUncomposedDoc(), "Full-screen element should be in doc");
+  NS_ASSERTION(element->IsInComposedDoc(), "Full-screen element should be in doc");
   NS_ASSERTION(element->OwnerDoc() == this, "Full-screen element should be in this doc");
   return element;
 }
@@ -10748,7 +10657,7 @@ nsresult nsDocument::RemoteFrameFullscreenReverted()
 }
 
 /* static */ bool
-nsDocument::IsUnprefixedFullscreenEnabled(JSContext* aCx, JSObject* aObject)
+nsIDocument::IsUnprefixedFullscreenEnabled(JSContext* aCx, JSObject* aObject)
 {
   MOZ_ASSERT(NS_IsMainThread());
   return nsContentUtils::IsCallerChrome() ||
@@ -10796,10 +10705,10 @@ nsDocument::FullscreenElementReadyCheck(Element* aElement,
 {
   NS_ASSERTION(aElement,
     "Must pass non-null element to nsDocument::RequestFullScreen");
-  if (!aElement || aElement == GetFullscreenElement()) {
+  if (!aElement || aElement == FullScreenStackTop()) {
     return false;
   }
-  if (!aElement->IsInUncomposedDoc()) {
+  if (!aElement->IsInComposedDoc()) {
     DispatchFullscreenError("FullscreenDeniedNotInDocument");
     return false;
   }
@@ -10823,8 +10732,11 @@ nsDocument::FullscreenElementReadyCheck(Element* aElement,
     DispatchFullscreenError("FullscreenDeniedSubDocFullScreen");
     return false;
   }
-  if (GetFullscreenElement() &&
-      !nsContentUtils::ContentIsDescendantOf(aElement, GetFullscreenElement())) {
+  //XXXsmaug Note, we don't follow the latest fullscreen spec here.
+  //         This whole check could be probably removed.
+  if (FullScreenStackTop() &&
+      !nsContentUtils::ContentIsHostIncludingDescendantOf(aElement,
+                                                          FullScreenStackTop())) {
     // If this document is full-screen, only grant full-screen requests from
     // a descendant of the current full-screen element.
     DispatchFullscreenError("FullscreenDeniedNotDescendant");
@@ -11184,16 +11096,6 @@ nsDocument::GetMozFullScreenElement(nsIDOMElement **aFullScreenElement)
   return NS_OK;
 }
 
-Element*
-nsDocument::GetFullscreenElement()
-{
-  Element* element = FullScreenStackTop();
-  NS_ASSERTION(!element ||
-               element->State().HasState(NS_EVENT_STATE_FULL_SCREEN),
-    "Fullscreen element should have fullscreen styles applied");
-  return element;
-}
-
 NS_IMETHODIMP
 nsDocument::GetMozFullScreen(bool *aFullScreen)
 {
@@ -11312,7 +11214,7 @@ GetPointerLockError(Element* aElement, Element* aCurrentLock,
     return "PointerLockDeniedInUse";
   }
 
-  if (!aElement->IsInUncomposedDoc()) {
+  if (!aElement->IsInComposedDoc()) {
     return "PointerLockDeniedNotInDocument";
   }
 
@@ -11363,11 +11265,11 @@ ChangePointerLockedElement(Element* aElement, nsIDocument* aDocument,
   MOZ_ASSERT(aDocument);
   MOZ_ASSERT(aElement != aPointerLockedElement);
   if (aPointerLockedElement) {
-    MOZ_ASSERT(aPointerLockedElement->GetUncomposedDoc() == aDocument);
+    MOZ_ASSERT(aPointerLockedElement->GetComposedDoc() == aDocument);
     aPointerLockedElement->ClearPointerLock();
   }
   if (aElement) {
-    MOZ_ASSERT(aElement->GetUncomposedDoc() == aDocument);
+    MOZ_ASSERT(aElement->GetComposedDoc() == aDocument);
     aElement->SetPointerLock();
     EventStateManager::sPointerLockedElement = do_GetWeakReference(aElement);
     EventStateManager::sPointerLockedDoc = do_GetWeakReference(aDocument);
@@ -11391,9 +11293,9 @@ PointerLockRequest::Run()
   nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument);
   nsDocument* d = static_cast<nsDocument*>(doc.get());
   const char* error = nullptr;
-  if (!e || !d || !e->GetUncomposedDoc()) {
+  if (!e || !d || !e->GetComposedDoc()) {
     error = "PointerLockDeniedNotInDocument";
-  } else if (e->GetUncomposedDoc() != d) {
+  } else if (e->GetComposedDoc() != d) {
     error = "PointerLockDeniedMovedDocument";
   }
   if (!error) {
@@ -11559,25 +11461,6 @@ nsDocument::GetMozPointerLockElement(nsIDOMElement** aPointerLockedElement)
   return NS_OK;
 }
 
-Element*
-nsIDocument::GetPointerLockElement()
-{
-  nsCOMPtr<Element> pointerLockedElement =
-    do_QueryReferent(EventStateManager::sPointerLockedElement);
-  if (!pointerLockedElement) {
-    return nullptr;
-  }
-
-  // Make sure pointer locked element is in the same document.
-  nsCOMPtr<nsIDocument> pointerLockedDoc =
-    do_QueryReferent(EventStateManager::sPointerLockedDoc);
-  if (pointerLockedDoc != this) {
-    return nullptr;
-  }
-
-  return pointerLockedElement;
-}
-
 nsresult
 nsDocument::Observe(nsISupports *aSubject,
                     const char *aTopic,

dom/base/nsDocument.h

@@ -692,14 +692,6 @@ public:
                                    nsIAtom* aAttrName,
                                    const nsAString& aAttrValue) const override;
 
-  virtual Element* ElementFromPointHelper(float aX, float aY,
-                                          bool aIgnoreRootScrollFrame,
-                                          bool aFlushLayout) override;
-
-  virtual void ElementsFromPointHelper(float aX, float aY,
-                                       uint32_t aFlags,
-                                       nsTArray<RefPtr<mozilla::dom::Element>>& aElements) override;
-
   virtual nsresult NodesFromRectHelper(float aX, float aY,
                                                    float aTopSize, float aRightSize,
                                                    float aBottomSize, float aLeftSize,
@@ -896,8 +888,6 @@ public:
   //
   already_AddRefed<nsSimpleContentList> BlockedTrackingNodes() const;
 
-  static bool IsUnprefixedFullscreenEnabled(JSContext* aCx, JSObject* aObject);
-
   // Do the "fullscreen element ready check" from the fullscreen spec.
   // It returns true if the given element is allowed to go into fullscreen.
   bool FullscreenElementReadyCheck(Element* aElement, bool aWasCallerChrome);
@@ -921,11 +911,10 @@ public:
   void FullScreenStackPop();
 
   // Returns the top element from the full-screen stack.
-  Element* FullScreenStackTop();
+  Element* FullScreenStackTop() override;
 
   // DOM-exposed fullscreen API
   bool FullscreenEnabled() override;
-  Element* GetFullscreenElement() override;
 
   void RequestPointerLock(Element* aElement) override;
   bool SetPointerLock(Element* aElement, int aCursorStyle);
@@ -1315,16 +1304,6 @@ private:
 
   nsresult InitCSP(nsIChannel* aChannel);
 
-  /**
-   * Find the (non-anonymous) content in this document for aFrame. It will
-   * be aFrame's content node if that content is in this document and not
-   * anonymous. Otherwise, when aFrame is in a subdocument, we use the frame
-   * element containing the subdocument containing aFrame, and/or find the
-   * nearest non-anonymous ancestor in this document.
-   * Returns null if there is no such element.
-   */
-  nsIContent* GetContentInThisDocument(nsIFrame* aFrame) const;
-
   // Just like EnableStyleSheetsForSet, but doesn't check whether
   // aSheetSet is null and allows the caller to control whether to set
   // aSheetSet as the preferred set in the CSSLoader.

dom/base/nsFocusManager.cpp

@@ -8,10 +8,12 @@
 #include "nsFocusManager.h"
 
 #include "AccessibleCaretEventHub.h"
+#include "ChildIterator.h"
+#include "nsAttrValueInlines.h"
 #include "nsIInterfaceRequestorUtils.h"
 #include "nsGkAtoms.h"
 #include "nsContentUtils.h"
-#include "nsIDocument.h"
+#include "nsDocument.h"
 #include "nsIEditor.h"
 #include "nsPIDOMWindow.h"
 #include "nsIDOMChromeWindow.h"
@@ -46,7 +48,9 @@
 
 #include "mozilla/ContentEvents.h"
 #include "mozilla/dom/Element.h"
+#include "mozilla/dom/ShadowRoot.h"
 #include "mozilla/dom/HTMLInputElement.h"
+#include "mozilla/dom/HTMLSlotElement.h"
 #include "mozilla/EventDispatcher.h"
 #include "mozilla/EventStateManager.h"
 #include "mozilla/EventStates.h"
@@ -2972,6 +2976,378 @@ nsFocusManager::DetermineElementToMoveFocus(nsPIDOMWindowOuter* aWindow,
   return NS_OK;
 }
 
+static bool
+IsHostOrSlot(nsIContent* aContent)
+{
+  return aContent && (aContent->GetShadowRoot() ||
+                      aContent->IsHTMLElement(nsGkAtoms::slot));
+}
+
+// Helper class to iterate contents in scope by traversing flattened tree
+// in tree order
+class MOZ_STACK_CLASS ScopedContentTraversal
+{
+public:
+  ScopedContentTraversal(nsIContent* aStartContent, nsIContent* aOwner)
+    : mCurrent(aStartContent)
+    , mOwner(aOwner)
+  {
+    MOZ_ASSERT(aStartContent);
+  }
+
+  void Next();
+  void Prev();
+
+  void Reset()
+  {
+    SetCurrent(mOwner);
+  }
+
+  nsIContent* GetCurrent()
+  {
+    return mCurrent;
+  }
+
+private:
+  void SetCurrent(nsIContent* aContent)
+  {
+    mCurrent = aContent;
+  }
+
+  nsIContent* mCurrent;
+  nsIContent* mOwner;
+};
+
+void
+ScopedContentTraversal::Next()
+{
+  MOZ_ASSERT(mCurrent);
+
+  // Get mCurrent's first child if it's in the same scope.
+  if (!IsHostOrSlot(mCurrent) || mCurrent == mOwner) {
+    StyleChildrenIterator iter(mCurrent);
+    nsIContent* child = iter.GetNextChild();
+    if (child) {
+      SetCurrent(child);
+      return;
+    }
+  }
+
+  // If mOwner has no children, END traversal
+  if (mCurrent == mOwner) {
+    SetCurrent(nullptr);
+    return;
+  }
+
+  nsIContent* current = mCurrent;
+  while (1) {
+    // Create parent's iterator and move to current
+    nsIContent* parent = current->GetFlattenedTreeParent();
+    StyleChildrenIterator parentIter(parent);
+    parentIter.Seek(current);
+
+    // Get next sibling of current
+    if (nsIContent* next = parentIter.GetNextChild()) {
+      SetCurrent(next);
+      return;
+    }
+
+    // If no next sibling and parent is mOwner, END traversal
+    if (parent == mOwner) {
+      SetCurrent(nullptr);
+      return;
+    }
+
+    current = parent;
+  }
+}
+
+void
+ScopedContentTraversal::Prev()
+{
+  MOZ_ASSERT(mCurrent);
+
+  nsIContent* parent;
+  nsIContent* last;
+  if (mCurrent == mOwner) {
+    // Get last child of mOwner
+    StyleChildrenIterator ownerIter(mOwner, false /* aStartAtBeginning */);
+    last = ownerIter.GetPreviousChild();
+
+    parent = last;
+  } else {
+    // Create parent's iterator and move to mCurrent
+    parent = mCurrent->GetFlattenedTreeParent();
+    StyleChildrenIterator parentIter(parent);
+    parentIter.Seek(mCurrent);
+
+    // Get previous sibling
+    last = parentIter.GetPreviousChild();
+  }
+
+  while (last) {
+    parent = last;
+    if (parent->GetShadowRoot() ||
+        parent->IsHTMLElement(nsGkAtoms::slot)) {
+      // Skip contents in other scopes
+      break;
+    }
+
+    // Find last child
+    StyleChildrenIterator iter(parent, false /* aStartAtBeginning */);
+    last = iter.GetPreviousChild();
+  }
+
+  // If parent is mOwner and no previous sibling remains, END traversal
+  SetCurrent(parent == mOwner ? nullptr : parent);
+}
+
+nsIContent*
+nsFocusManager::FindOwner(nsIContent* aContent)
+{
+  nsIContent* currentContent = aContent;
+  while (currentContent) {
+    nsIContent* parent = currentContent->GetFlattenedTreeParent();
+
+    // Shadow host / Slot
+    if (IsHostOrSlot(parent)) {
+      return parent;
+    }
+
+    currentContent = parent;
+  }
+
+  return nullptr;
+}
+
+/**
+ * Host and Slot elements need to be handled as if they had tabindex 0 even
+ * when they don't have the attribute. This is a helper method to get the
+ * right value for focus navigation. If aIsFocusable is passed, it is set to
+ * true if the element itself is focusable.
+ */
+static int32_t
+HostOrSlotTabIndexValue(nsIContent* aContent,
+                        bool* aIsFocusable = nullptr)
+{
+  MOZ_ASSERT(IsHostOrSlot(aContent));
+
+  if (aIsFocusable) {
+    *aIsFocusable = false;
+    nsIFrame* frame = aContent->GetPrimaryFrame();
+    if (frame) {
+      int32_t tabIndex;
+      frame->IsFocusable(&tabIndex, 0);
+      *aIsFocusable = tabIndex >= 0;
+    }
+  }
+
+  const nsAttrValue* attrVal =
+    aContent->AsElement()->GetParsedAttr(nsGkAtoms::tabindex);
+  if (!attrVal) {
+    return 0;
+  }
+
+  if (attrVal->Type() == nsAttrValue::eInteger) {
+    return attrVal->GetIntegerValue();
+  }
+
+  return -1;
+}
+
+nsIContent*
+nsFocusManager::GetNextTabbableContentInScope(nsIContent* aOwner,
+                                              nsIContent* aStartContent,
+                                              nsIContent* aOriginalStartContent,
+                                              bool aForward,
+                                              int32_t aCurrentTabIndex,
+                                              bool aIgnoreTabIndex,
+                                              bool aForDocumentNavigation,
+                                              bool aSkipOwner)
+{
+  MOZ_ASSERT(IsHostOrSlot(aOwner), "Scope owner should be host or slot");
+
+  if (!aSkipOwner && (aForward && aOwner == aStartContent)) {
+    int32_t tabIndex = -1;
+    nsIFrame* frame = aOwner->GetPrimaryFrame();
+    if (frame && frame->IsFocusable(&tabIndex, false) && tabIndex >= 0) {
+      return aOwner;
+    }
+  }
+
+  //
+  // Iterate contents in scope
+  //
+  ScopedContentTraversal contentTraversal(aStartContent, aOwner);
+  nsCOMPtr<nsIContent> iterContent;
+  nsIContent* firstNonChromeOnly = aStartContent->IsInNativeAnonymousSubtree() ?
+    aStartContent->FindFirstNonChromeOnlyAccessContent() : nullptr;
+  while (1) {
+    // Iterate tab index to find corresponding contents in scope
+
+    while (1) {
+      // Iterate remaining contents in scope to find next content to focus
+
+      // Get next content
+      aForward ? contentTraversal.Next() : contentTraversal.Prev();
+      iterContent = contentTraversal.GetCurrent();
+
+      if (firstNonChromeOnly && firstNonChromeOnly == iterContent) {
+        // We just broke out from the native anonymous content, so move
+        // to the previous/next node of the native anonymous owner.
+        if (aForward) {
+          contentTraversal.Next();
+        } else {
+          contentTraversal.Prev();
+        }
+        iterContent = contentTraversal.GetCurrent();
+      }
+
+      if (!iterContent) {
+        // Reach the end
+        break;
+      }
+
+      // Get the tab index of the next element. For NAC we rely on frames.
+      //XXXsmaug we should probably use frames also for Shadow DOM and special
+      //         case only display:contents elements.
+      int32_t tabIndex = 0;
+      if (iterContent->IsInNativeAnonymousSubtree() &&
+          iterContent->GetPrimaryFrame()) {
+        iterContent->GetPrimaryFrame()->IsFocusable(&tabIndex);
+      } else if (IsHostOrSlot(iterContent)) {
+        tabIndex = HostOrSlotTabIndexValue(iterContent);
+      } else {
+        iterContent->IsFocusable(&tabIndex);
+      }
+      if (tabIndex < 0 || !(aIgnoreTabIndex || tabIndex == aCurrentTabIndex)) {
+        continue;
+      }
+
+      if (!IsHostOrSlot(iterContent)) {
+        nsCOMPtr<nsIContent> elementInFrame;
+        bool checkSubDocument = true;
+        if (aForDocumentNavigation &&
+            TryDocumentNavigation(iterContent, &checkSubDocument,
+                                  getter_AddRefs(elementInFrame))) {
+          return elementInFrame;
+        }
+        if (!checkSubDocument) {
+          continue;
+        }
+
+        if (TryToMoveFocusToSubDocument(iterContent, aOriginalStartContent,
+                                        aForward, aForDocumentNavigation,
+                                        getter_AddRefs(elementInFrame))) {
+          return elementInFrame;
+        }
+
+        // Found content to focus
+        return iterContent;
+      }
+
+      // Search in scope owned by iterContent
+      nsIContent* contentToFocus =
+        GetNextTabbableContentInScope(iterContent, iterContent,
+                                      aOriginalStartContent, aForward,
+                                      aForward ? 1 : 0, aIgnoreTabIndex,
+                                      aForDocumentNavigation,
+                                      false /* aSkipOwner */);
+      if (contentToFocus) {
+        return contentToFocus;
+      }
+    };
+
+    // If already at lowest priority tab (0), end search completely.
+    // A bit counterintuitive but true, tabindex order goes 1, 2, ... 32767, 0
+    if (aCurrentTabIndex == (aForward ? 0 : 1)) {
+      break;
+    }
+
+    // Continue looking for next highest priority tabindex
+    aCurrentTabIndex = GetNextTabIndex(aOwner, aCurrentTabIndex, aForward);
+    contentTraversal.Reset();
+  }
+
+  // Return scope owner at last for backward navigation if its tabindex
+  // is non-negative
+  if (!aSkipOwner && !aForward) {
+    int32_t tabIndex = -1;
+    nsIFrame* frame = aOwner->GetPrimaryFrame();
+    if (frame && frame->IsFocusable(&tabIndex, false) && tabIndex >= 0) {
+      return aOwner;
+    }
+  }
+
+  return nullptr;
+}
+
+nsIContent*
+nsFocusManager::GetNextTabbableContentInAncestorScopes(
+  nsIContent* aStartOwner,
+  nsIContent** aStartContent,
+  nsIContent* aOriginalStartContent,
+  bool aForward,
+  int32_t* aCurrentTabIndex,
+  bool aIgnoreTabIndex,
+  bool aForDocumentNavigation)
+{
+  MOZ_ASSERT(aStartOwner == FindOwner(*aStartContent),
+             "aStartOwner should be the scope owner of aStartContent");
+  MOZ_ASSERT(IsHostOrSlot(aStartOwner), "scope owner should be host or slot");
+
+  nsIContent* owner = aStartOwner;
+  nsIContent* startContent = *aStartContent;
+
+  while (IsHostOrSlot(owner)) {
+    int32_t tabIndex = 0;
+    if (IsHostOrSlot(startContent)) {
+      tabIndex = HostOrSlotTabIndexValue(startContent);
+    } else {
+      startContent->IsFocusable(&tabIndex);
+    }
+    nsIContent* contentToFocus =
+      GetNextTabbableContentInScope(owner, startContent, aOriginalStartContent,
+                                    aForward, tabIndex, aIgnoreTabIndex,
+                                    aForDocumentNavigation,
+                                    false /* aSkipOwner */);
+    if (contentToFocus) {
+      return contentToFocus;
+    }
+
+    startContent = owner;
+    owner = FindOwner(startContent);
+  }
+
+  // If not found in shadow DOM, search from the top level shadow host in light DOM
+  *aStartContent = startContent;
+  *aCurrentTabIndex = HostOrSlotTabIndexValue(startContent);
+
+  return nullptr;
+}
+
+static nsIContent*
+GetTopLevelScopeOwner(nsIContent* aContent)
+{
+  nsIContent* topLevelScopeOwner = nullptr;
+  while (aContent) {
+    if (HTMLSlotElement* slot = aContent->GetAssignedSlot()) {
+      aContent = slot;
+    } else if (ShadowRoot* shadowRoot = aContent->GetContainingShadow()) {
+      aContent = shadowRoot->Host();
+      topLevelScopeOwner = aContent;
+    } else {
+      // TODO: replaced with FromNode.
+      if (HTMLSlotElement::FromContentOrNull(aContent)) {
+        topLevelScopeOwner = aContent;
+      }
+      aContent = aContent->GetParent();
+    }
+  }
+
+  return topLevelScopeOwner;
+}
+
 nsresult
 nsFocusManager::GetNextTabbableContent(nsIPresShell* aPresShell,
                                        nsIContent* aRootContent,
@@ -2989,70 +3365,163 @@ nsFocusManager::GetNextTabbableContent(nsIPresShell* aPresShell,
   if (!startContent)
     return NS_OK;
 
+  nsIContent* currentTopLevelScopeOwner = GetTopLevelScopeOwner(aStartContent);
+
   LOGCONTENTNAVIGATION("GetNextTabbable: %s", aStartContent);
   LOGFOCUSNAVIGATION(("  tabindex: %d", aCurrentTabIndex));
 
+  if (nsDocument::IsWebComponentsEnabled(aRootContent)) {
+    // If aStartContent is a shadow host or slot in forward navigation,
+    // search in scope owned by aStartContent.
+    if (aForward && IsHostOrSlot(aStartContent)) {
+      nsIContent* contentToFocus =
+        GetNextTabbableContentInScope(aStartContent, aStartContent,
+                                      aOriginalStartContent, aForward,
+                                      aForward ? 1 : 0, aIgnoreTabIndex,
+                                      aForDocumentNavigation,
+                                      true /* aSkipOwner */);
+      if (contentToFocus) {
+        NS_ADDREF(*aResultContent = contentToFocus);
+        return NS_OK;
+      }
+    }
+
+    // If aStartContent is in a scope owned by Shadow DOM search from scope
+    // including aStartContent.
+    if (nsIContent* owner = FindOwner(aStartContent)) {
+      nsIContent* contentToFocus =
+        GetNextTabbableContentInAncestorScopes(owner,
+                                               &aStartContent,
+                                               aOriginalStartContent,
+                                               aForward,
+                                               &aCurrentTabIndex,
+                                               aIgnoreTabIndex,
+                                               aForDocumentNavigation);
+      if (contentToFocus) {
+        NS_ADDREF(*aResultContent = contentToFocus);
+        return NS_OK;
+      }
+    }
+
+    // If we reach here, it means no next tabbable content in shadow DOM.
+    // We need to continue searching in light DOM, starting at the top level
+    // shadow host in light DOM (updated aStartContent) and its tabindex
+    // (updated aCurrentTabIndex).
+    MOZ_ASSERT(!FindOwner(aStartContent),
+               "aStartContent should not be owned by Shadow DOM at this point");
+  }
+
   nsPresContext* presContext = aPresShell->GetPresContext();
 
   bool getNextFrame = true;
   nsCOMPtr<nsIContent> iterStartContent = aStartContent;
+  // Iterate tab index to find corresponding contents
   while (1) {
-    nsIFrame* startFrame = iterStartContent->GetPrimaryFrame();
+    nsIFrame* frame = iterStartContent->GetPrimaryFrame();
     // if there is no frame, look for another content node that has a frame
-    if (!startFrame) {
+    while (!frame) {
       // if the root content doesn't have a frame, just return
-      if (iterStartContent == aRootContent)
+      if (iterStartContent == aRootContent) {
         return NS_OK;
+      }
 
       // look for the next or previous content node in tree order
-      iterStartContent = aForward ? iterStartContent->GetNextNode() : iterStartContent->GetPreviousContent();
+      iterStartContent = aForward ? iterStartContent->GetNextNode()
+                                  : iterStartContent->GetPreviousContent();
+      if (!iterStartContent) {
+        break;
+      }
+      
+      frame = iterStartContent->GetPrimaryFrame();
+      // Host without frame, enter its scope.
+      if (nsDocument::IsWebComponentsEnabled(aRootContent) &&
+          (!frame && iterStartContent->GetShadowRoot())) {
+        int32_t tabIndex = HostOrSlotTabIndexValue(iterStartContent);
+        if (tabIndex >= 0 &&
+            (aIgnoreTabIndex || aCurrentTabIndex == tabIndex)) {
+          nsIContent* contentToFocus = GetNextTabbableContentInScope(
+              iterStartContent, iterStartContent, aOriginalStartContent,
+              aForward, aForward ? 1 : 0, aIgnoreTabIndex,
+              aForDocumentNavigation, true /* aSkipOwner */);
+          if (contentToFocus) {
+            NS_ADDREF(*aResultContent = contentToFocus);
+            return NS_OK;
+          }
+        }
+      }
       // we've already skipped over the initial focused content, so we
       // don't want to traverse frames.
       getNextFrame = false;
-      if (iterStartContent)
-        continue;
-
-      // otherwise, as a last attempt, just look at the root content
-      iterStartContent = aRootContent;
-      continue;
     }
 
-    // For tab navigation, pass false for aSkipPopupChecks so that we don't
-    // iterate into or out of a popup. For document naviation pass true to
-    // ignore these boundaries.
     nsCOMPtr<nsIFrameEnumerator> frameTraversal;
-    nsresult rv = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),
-                                       presContext, startFrame,
-                                       ePreOrder,
-                                       false, // aVisual
-                                       false, // aLockInScrollView
-                                       true,  // aFollowOOFs
-                                       aForDocumentNavigation  // aSkipPopupChecks
-                                       );
-    NS_ENSURE_SUCCESS(rv, rv);
+    if (frame) {
+      // For tab navigation, pass false for aSkipPopupChecks so that we don't
+      // iterate into or out of a popup. For document navigation, pass true to
+      // ignore these boundaries.
+      nsresult rv = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),
+                                         presContext,
+                                         frame,
+                                         ePreOrder,
+                                         false, // aVisual
+                                         false, // aLockInScrollView
+                                         true,  // aFollowOOFs
+                                         aForDocumentNavigation  // aSkipPopupChecks
+                                         );
+      NS_ENSURE_SUCCESS(rv, rv);
 
-    if (iterStartContent == aRootContent) {
-      if (!aForward) {
-        frameTraversal->Last();
-      } else if (aRootContent->IsFocusable()) {
-        frameTraversal->Next();
+      if (iterStartContent == aRootContent) {
+        if (!aForward) {
+          frameTraversal->Last();
+        } else if (aRootContent->IsFocusable()) {
+          frameTraversal->Next();
+        }
+        frame = static_cast<nsIFrame*>(frameTraversal->CurrentItem());
+      } else if (getNextFrame &&
+                 (!iterStartContent ||
+                  !iterStartContent->IsHTMLElement(nsGkAtoms::area))) {
+        // Need to do special check in case we're in an imagemap which has multiple
+        // content nodes per frame, so don't skip over the starting frame.
+        if (aForward) {
+          frameTraversal->Next();
+        } else {
+          frameTraversal->Prev();
+        }
+        
+        frame = static_cast<nsIFrame*>(frameTraversal->CurrentItem());
       }
     }
-    else if (getNextFrame &&
-             (!iterStartContent ||
-              !iterStartContent->IsHTMLElement(nsGkAtoms::area))) {
-      // Need to do special check in case we're in an imagemap which has multiple
-      // content nodes per frame, so don't skip over the starting frame.
-      if (aForward)
-        frameTraversal->Next();
-      else
-        frameTraversal->Prev();
-    }
 
     // Walk frames to find something tabbable matching mCurrentTabIndex
-    nsIFrame* frame = static_cast<nsIFrame*>(frameTraversal->CurrentItem());
     while (frame) {
       nsIContent* currentContent = frame->GetContent();
+      if (nsDocument::IsWebComponentsEnabled(currentContent)) {
+        // Try to find the topmost scope owner, since we want to skip the node
+        // that is not owned by document in frame traversal.
+        nsIContent* oldTopLevelScopeOwner = currentTopLevelScopeOwner;
+        if (!aForward || oldTopLevelScopeOwner != currentContent) {
+          currentTopLevelScopeOwner = GetTopLevelScopeOwner(currentContent);
+        } else {
+          currentTopLevelScopeOwner = currentContent;
+        }
+        if (currentTopLevelScopeOwner) {
+          if (currentTopLevelScopeOwner == oldTopLevelScopeOwner) {
+            // We're within non-document scope, continue.
+            do {
+              if (aForward) {
+                frameTraversal->Next();
+              } else {
+                frameTraversal->Prev();
+              }
+              frame = static_cast<nsIFrame*>(frameTraversal->CurrentItem());
+              // For the usage of GetPrevContinuation, see the comment
+              // at the end of while (frame) loop.
+            } while (frame && frame->GetPrevContinuation());
+            continue;
+          }
+          currentContent = currentTopLevelScopeOwner;
+        }
+      }
 
       // For document navigation, check if this element is an open panel. Since
       // panels aren't focusable (tabIndex would be -1), we'll just assume that
@@ -3086,7 +3555,7 @@ nsFocusManager::GetNextTabbableContent(nsIPresShell* aPresShell,
             // and root content, so that we only find content within the panel.
             // Note also that we pass false for aForDocumentNavigation since we
             // want to locate the first content, not the first document.
-            rv = GetNextTabbableContent(aPresShell, currentContent,
+            nsresult rv = GetNextTabbableContent(aPresShell, currentContent,
                                         nullptr, currentContent,
                                         true, 1, false, false,
                                         aResultContent);
@@ -3097,6 +3566,34 @@ nsFocusManager::GetNextTabbableContent(nsIPresShell* aPresShell,
         }
       }
 
+      // As of now, 2018/04/12, sequential focus navigation is still
+      // in the obsolete Shadow DOM specification.
+      // http://w3c.github.io/webcomponents/spec/shadow/#sequential-focus-navigation
+      // "if ELEMENT is focusable, a shadow host, or a slot element,
+      //  append ELEMENT to NAVIGATION-ORDER."
+      // and later in "For each element ELEMENT in NAVIGATION-ORDER: "
+      // hosts and slots are handled before other elements.
+      if (nsDocument::IsWebComponentsEnabled(currentContent) &&
+          IsHostOrSlot(currentContent)) {
+        bool focusableHostSlot;
+        int32_t tabIndex =
+            HostOrSlotTabIndexValue(currentContent, &focusableHostSlot);
+        // Host or slot itself isn't focusable or going backwards, enter its scope.
+        if ((!aForward || !focusableHostSlot) && tabIndex >= 0 &&
+            (aIgnoreTabIndex || aCurrentTabIndex == tabIndex)) {
+          nsIContent* contentToFocus =
+            GetNextTabbableContentInScope(currentContent, currentContent,
+                                          aOriginalStartContent, aForward,
+                                          aForward ? 1 : 0, aIgnoreTabIndex,
+                                          aForDocumentNavigation,
+                                          true /* aSkipOwner */);
+          if (contentToFocus) {
+            NS_ADDREF(*aResultContent = contentToFocus);
+            return NS_OK;
+          }
+        }
+      }
+
       // TabIndex not set defaults to 0 for form elements, anchors and other
       // elements that are normally focusable. Tabindex defaults to -1
       // for elements that are not normally focusable.
@@ -3145,54 +3642,22 @@ nsFocusManager::GetNextTabbableContent(nsIPresShell* aPresShell,
 
           // Next, for document navigation, check if this a non-remote child document.
           bool checkSubDocument = true;
-          if (aForDocumentNavigation) {
-            nsIContent* docRoot = GetRootForChildDocument(currentContent);
-            if (docRoot) {
-              // If GetRootForChildDocument returned something then call
-              // FocusFirst to find the root or first element to focus within
-              // the child document. If this is a frameset though, skip this and
-              // fall through to the checkSubDocument block below to iterate into
-              // the frameset's frames and locate the first focusable frame.
-              if (!docRoot->IsHTMLElement(nsGkAtoms::frameset)) {
-                return FocusFirst(docRoot, aResultContent);
-              }
-            } else {
-              // Set checkSubDocument to false, as this was neither a frame
-              // type element or a child document that was focusable.
-              checkSubDocument = false;
-            }
+          if (aForDocumentNavigation &&
+              TryDocumentNavigation(currentContent, &checkSubDocument,
+                                    aResultContent)) {
+            return NS_OK;
           }
 
           if (checkSubDocument) {
             // found a node with a matching tab index. Check if it is a child
             // frame. If so, navigate into the child frame instead.
-            nsIDocument* doc = currentContent->GetComposedDoc();
-            NS_ASSERTION(doc, "content not in document");
-            nsIDocument* subdoc = doc->GetSubDocumentFor(currentContent);
-            if (subdoc && !subdoc->EventHandlingSuppressed()) {
-              if (aForward) {
-                // when tabbing forward into a frame, return the root
-                // frame so that the canvas becomes focused.
-                nsCOMPtr<nsPIDOMWindowOuter> subframe = subdoc->GetWindow();
-                if (subframe) {
-                  *aResultContent = GetRootForFocus(subframe, subdoc, false, true);
-                  if (*aResultContent) {
-                    NS_ADDREF(*aResultContent);
-                    return NS_OK;
-                  }
-                }
-              }
-              Element* rootElement = subdoc->GetRootElement();
-              nsIPresShell* subShell = subdoc->GetShell();
-              if (rootElement && subShell) {
-                rv = GetNextTabbableContent(subShell, rootElement,
-                                            aOriginalStartContent, rootElement,
-                                            aForward, (aForward ? 1 : 0),
-                                            false, aForDocumentNavigation, aResultContent);
-                NS_ENSURE_SUCCESS(rv, rv);
-                if (*aResultContent)
-                  return NS_OK;
-              }
+            if (TryToMoveFocusToSubDocument(currentContent,
+                                            aOriginalStartContent,
+                                            aForward,
+                                            aForDocumentNavigation,
+                                            aResultContent)) {
+              MOZ_ASSERT(*aResultContent);
+              return NS_OK;
             }
             // otherwise, use this as the next content node to tab to, unless
             // this was the element we started on. This would happen for
@@ -3263,6 +3728,77 @@ nsFocusManager::GetNextTabbableContent(nsIPresShell* aPresShell,
   return NS_OK;
 }
 
+bool
+nsFocusManager::TryDocumentNavigation(nsIContent* aCurrentContent,
+                                      bool* aCheckSubDocument,
+                                      nsIContent** aResultContent)
+{
+  *aCheckSubDocument = true;
+  nsIContent* docRoot = GetRootForChildDocument(aCurrentContent);
+  if (docRoot) {
+    // If GetRootForChildDocument returned something then call
+    // FocusFirst to find the root or first element to focus within
+    // the child document. If this is a frameset though, skip this and
+    // fall through to normal tab navigation to iterate into
+    // the frameset's frames and locate the first focusable frame.
+    if (!docRoot->IsHTMLElement(nsGkAtoms::frameset)) {
+      *aCheckSubDocument = false;
+      Unused << FocusFirst(docRoot, aResultContent);
+      return *aResultContent != nullptr;
+    }
+  } else {
+    // Set aCheckSubDocument to false, as this was neither a frame
+    // type element or a child document that was focusable.
+    *aCheckSubDocument = false;
+  }
+
+  return false;
+}
+
+bool
+nsFocusManager::TryToMoveFocusToSubDocument(nsIContent* aCurrentContent,
+                                            nsIContent* aOriginalStartContent,
+                                            bool aForward,
+                                            bool aForDocumentNavigation,
+                                            nsIContent** aResultContent)
+{
+  nsIDocument* doc = aCurrentContent->GetComposedDoc();
+  NS_ASSERTION(doc, "content not in document");
+  nsIDocument* subdoc = doc->GetSubDocumentFor(aCurrentContent);
+  if (subdoc && !subdoc->EventHandlingSuppressed()) {
+    if (aForward) {
+      // when tabbing forward into a frame, return the root
+      // frame so that the canvas becomes focused.
+      nsCOMPtr<nsPIDOMWindowOuter> subframe = subdoc->GetWindow();
+      if (subframe) {
+        *aResultContent = GetRootForFocus(subframe, subdoc, false, true);
+        if (*aResultContent) {
+          NS_ADDREF(*aResultContent);
+          return true;
+        }
+      }
+    }
+    Element* rootElement = subdoc->GetRootElement();
+    nsIPresShell* subShell = subdoc->GetShell();
+    if (rootElement && subShell) {
+      nsresult rv = GetNextTabbableContent(subShell,
+                                           rootElement,
+                                           aOriginalStartContent,
+                                           rootElement,
+                                           aForward,
+                                           (aForward ? 1 : 0),
+                                           false,
+                                           aForDocumentNavigation,
+                                           aResultContent);
+      NS_ENSURE_SUCCESS(rv, false);
+      if (*aResultContent) {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
 nsIContent*
 nsFocusManager::GetNextTabbableMapArea(bool aForward,
                                        int32_t aCurrentTabIndex,
@@ -3309,15 +3845,20 @@ nsFocusManager::GetNextTabIndex(nsIContent* aParent,
                                 bool aForward)
 {
   int32_t tabIndex, childTabIndex;
+  StyleChildrenIterator iter(aParent);
 
   if (aForward) {
     tabIndex = 0;
-    for (nsIContent* child = aParent->GetFirstChild();
+    for (nsIContent* child = iter.GetNextChild();
          child;
-         child = child->GetNextSibling()) {
-      childTabIndex = GetNextTabIndex(child, aCurrentTabIndex, aForward);
-      if (childTabIndex > aCurrentTabIndex && childTabIndex != tabIndex) {
-        tabIndex = (tabIndex == 0 || childTabIndex < tabIndex) ? childTabIndex : tabIndex;
+         child = iter.GetNextChild()) {
+      // Skip child's descendants if child is a shadow host, as they are
+      // in the focus navigation scope owned by child's shadow root
+      if (!(nsDocument::IsWebComponentsEnabled(aParent) && IsHostOrSlot(child))) {
+        childTabIndex = GetNextTabIndex(child, aCurrentTabIndex, aForward);
+        if (childTabIndex > aCurrentTabIndex && childTabIndex != tabIndex) {
+          tabIndex = (tabIndex == 0 || childTabIndex < tabIndex) ? childTabIndex : tabIndex;
+        }
       }
 
       nsAutoString tabIndexStr;
@@ -3331,13 +3872,17 @@ nsFocusManager::GetNextTabIndex(nsIContent* aParent,
   }
   else { /* !aForward */
     tabIndex = 1;
-    for (nsIContent* child = aParent->GetFirstChild();
+    for (nsIContent* child = iter.GetNextChild();
          child;
-         child = child->GetNextSibling()) {
-      childTabIndex = GetNextTabIndex(child, aCurrentTabIndex, aForward);
-      if ((aCurrentTabIndex == 0 && childTabIndex > tabIndex) ||
-          (childTabIndex < aCurrentTabIndex && childTabIndex > tabIndex)) {
-        tabIndex = childTabIndex;
+         child = iter.GetNextChild()) {
+      // Skip child's descendants if child is a shadow host, as they are
+      // in the focus navigation scope owned by child's shadow root
+      if (!(nsDocument::IsWebComponentsEnabled(aParent) && IsHostOrSlot(child))) {
+        childTabIndex = GetNextTabIndex(child, aCurrentTabIndex, aForward);
+        if ((aCurrentTabIndex == 0 && childTabIndex > tabIndex) ||
+            (childTabIndex < aCurrentTabIndex && childTabIndex > tabIndex)) {
+          tabIndex = childTabIndex;
+        }
       }
 
       nsAutoString tabIndexStr;

dom/base/nsFocusManager.h

@@ -384,6 +384,91 @@ protected:
                                        int32_t aType, bool aNoParentTraversal,
                                        nsIContent** aNextContent);
 
+  /**
+   * Returns scope owner of aContent.
+   * A scope owner is either a document root, shadow host, or slot.
+   */
+  nsIContent* FindOwner(nsIContent* aContent);
+
+  /**
+   * Retrieve the next tabbable element in scope owned by aOwner, using
+   * focusability and tabindex to determine the tab order.
+   *
+   * aOwner is the owner of scope to search in.
+   *
+   * aStartContent is the starting point for this call of this method.
+   *
+   * aOriginalStartContent is the initial starting point for sequential
+   * navigation.
+   *
+   * aForward should be true for forward navigation or false for backward
+   * navigation.
+   *
+   * aCurrentTabIndex is the current tabindex.
+   *
+   * aIgnoreTabIndex to ignore the current tabindex and find the element
+   * irrespective or the tab index.
+   *
+   * aForDocumentNavigation informs whether we're navigating only through
+   * documents.
+   *
+   * aSkipOwner to skip owner while searching. The flag is set when caller is
+   * |GetNextTabbableContent| in order to let caller handle owner.
+   *
+   * NOTE:
+   *   Consider the method searches downwards in flattened subtree
+   *   rooted at aOwner.
+   */
+  nsIContent* GetNextTabbableContentInScope(nsIContent* aOwner,
+                                            nsIContent* aStartContent,
+                                            nsIContent* aOriginalStartContent,
+                                            bool aForward,
+                                            int32_t aCurrentTabIndex,
+                                            bool aIgnoreTabIndex,
+                                            bool aForDocumentNavigation,
+                                            bool aSkipOwner);
+
+  /**
+   * Retrieve the next tabbable element in scope including aStartContent
+   * and the scope's ancestor scopes, using focusability and tabindex to
+   * determine the tab order.
+   *
+   * aStartOwner is the scope owner of the aStartContent.
+   *
+   * aStartContent an in/out paremeter. It as input is the starting point
+   * for this call of this method; as output it is the shadow host in
+   * light DOM if the next tabbable element is not found in shadow DOM,
+   * in order to continue searching in light DOM.
+   *
+   * aOriginalStartContent is the initial starting point for sequential
+   * navigation.
+   *
+   * aForward should be true for forward navigation or false for backward
+   * navigation.
+   *
+   * aCurrentTabIndex returns tab index of shadow host in light DOM if the
+   * next tabbable element is not found in shadow DOM, in order to continue
+   * searching in light DOM.
+   *
+   * aIgnoreTabIndex to ignore the current tabindex and find the element
+   * irrespective or the tab index.
+   *
+   * aForDocumentNavigation informs whether we're navigating only through
+   * documents.
+   *
+   * NOTE:
+   *   Consider the method searches upwards in all shadow host- or slot-rooted
+   *   flattened subtrees that contains aStartContent as non-root, except
+   *   the flattened subtree rooted at shadow host in light DOM.
+   */
+  nsIContent* GetNextTabbableContentInAncestorScopes(nsIContent* aStartOwner,
+                                                     nsIContent** aStartContent,
+                                                     nsIContent* aOriginalStartContent,
+                                                     bool aForward,
+                                                     int32_t* aCurrentTabIndex,
+                                                     bool aIgnoreTabIndex,
+                                                     bool aForDocumentNavigation);
+
   /**
    * Retrieve the next tabbable element within a document, using focusability
    * and tabindex to determine the tab order. The element is returned in
@@ -503,6 +588,16 @@ private:
 
   void SetFocusedWindowInternal(nsPIDOMWindowOuter* aWindow);
 
+  bool TryDocumentNavigation(nsIContent* aCurrentContent,
+                             bool* aCheckSubDocument,
+                             nsIContent** aResultContent);
+
+  bool TryToMoveFocusToSubDocument(nsIContent* aCurrentContent,
+                                   nsIContent* aOriginalStartContent,
+                                   bool aForward,
+                                   bool aForDocumentNavigation,
+                                   nsIContent** aResultContent);
+
   // the currently active and front-most top-most window
   nsCOMPtr<nsPIDOMWindowOuter> mActiveWindow;
 

dom/base/nsGkAtomList.h

@@ -39,6 +39,7 @@ GK_ATOM(_moz_resizing, "_moz_resizing")
 GK_ATOM(mozallowfullscreen, "mozallowfullscreen")
 GK_ATOM(moztype, "_moz-type")
 GK_ATOM(mozdirty, "_moz_dirty")
+GK_ATOM(_is_cropped, "_is_cropped")
 GK_ATOM(mozdisallowselectionprint, "mozdisallowselectionprint")
 GK_ATOM(mozdonotsend, "moz-do-not-send")
 GK_ATOM(mozeditorbogusnode, "_moz_editor_bogus_node")

dom/base/nsHTMLContentSerializer.cpp

@@ -284,7 +284,7 @@ nsHTMLContentSerializer::AppendElementStart(Element* aElement,
   if (ns == kNameSpaceID_XHTML &&
       (name == nsGkAtoms::script ||
        name == nsGkAtoms::style ||
-       name == nsGkAtoms::noscript ||
+       (name == nsGkAtoms::noscript && aElement->OwnerDoc()->IsScriptEnabled()) ||
        name == nsGkAtoms::noframes)) {
     ++mDisableEntityEncoding;
   }
@@ -314,7 +314,7 @@ nsHTMLContentSerializer::AppendElementEnd(Element* aElement,
   if (ns == kNameSpaceID_XHTML &&
       (name == nsGkAtoms::script ||
        name == nsGkAtoms::style ||
-       name == nsGkAtoms::noscript ||
+       (name == nsGkAtoms::noscript && aElement->OwnerDoc()->IsScriptEnabled()) ||
        name == nsGkAtoms::noframes)) {
     --mDisableEntityEncoding;
   }

dom/base/nsIDocument.h

@@ -1811,26 +1811,6 @@ public:
                                    nsIAtom* aAttrName,
                                    const nsAString& aAttrValue) const = 0;
 
-  /**
-   * Helper for nsIDOMDocument::elementFromPoint implementation that allows
-   * ignoring the scroll frame and/or avoiding layout flushes.
-   *
-   * @see nsIDOMWindowUtils::elementFromPoint
-   */
-  virtual Element* ElementFromPointHelper(float aX, float aY,
-                                          bool aIgnoreRootScrollFrame,
-                                          bool aFlushLayout) = 0;
-
-  enum ElementsFromPointFlags {
-    IGNORE_ROOT_SCROLL_FRAME = 1,
-    FLUSH_LAYOUT = 2,
-    IS_ELEMENT_FROM_POINT = 4
-  };
-
-  virtual void ElementsFromPointHelper(float aX, float aY,
-                                       uint32_t aFlags,
-                                       nsTArray<RefPtr<mozilla::dom::Element>>& aElements) = 0;
-
   virtual nsresult NodesFromRectHelper(float aX, float aY,
                                        float aTopSize, float aRightSize,
                                        float aBottomSize, float aLeftSize,
@@ -2637,17 +2617,17 @@ public:
   nsIURI* GetDocumentURIObject() const;
   // Not const because all the full-screen goop is not const
   virtual bool FullscreenEnabled() = 0;
-  virtual Element* GetFullscreenElement() = 0;
+  virtual Element* FullScreenStackTop() = 0;
   bool Fullscreen()
   {
     return !!GetFullscreenElement();
   }
   void ExitFullscreen();
-  Element* GetPointerLockElement();
   void ExitPointerLock()
   {
     UnlockPointer(this);
   }
+  static bool IsUnprefixedFullscreenEnabled(JSContext* aCx, JSObject* aObject);
 #ifdef MOZILLA_INTERNAL_API
   bool Hidden() const
   {
@@ -2664,10 +2644,6 @@ public:
   void GetPreferredStyleSheetSet(nsAString& aSheetSet);
   virtual mozilla::dom::DOMStringList* StyleSheetSets() = 0;
   virtual void EnableStyleSheetsForSet(const nsAString& aSheetSet) = 0;
-  Element* ElementFromPoint(float aX, float aY);
-  void ElementsFromPoint(float aX,
-                         float aY,
-                         nsTArray<RefPtr<mozilla::dom::Element>>& aElements);
 
   /**
    * Retrieve the location of the caret position (DOM node and character
@@ -2835,6 +2811,16 @@ public:
 
   bool ModuleScriptsEnabled();
 
+  /**
+   * Find the (non-anonymous) content in this document for aFrame. It will
+   * be aFrame's content node if that content is in this document and not
+   * anonymous. Otherwise, when aFrame is in a subdocument, we use the frame
+   * element containing the subdocument containing aFrame, and/or find the
+   * nearest non-anonymous ancestor in this document.
+   * Returns null if there is no such element.
+   */
+  nsIContent* GetContentInThisDocument(nsIFrame* aFrame) const;
+
   virtual void AddResizeObserver(mozilla::dom::ResizeObserver* aResizeObserver) = 0;
 
   virtual void ScheduleResizeObserversNotification() const = 0;

dom/base/nsINode.cpp

@@ -273,6 +273,18 @@ nsINode* nsINode::GetRootNode(const GetRootNodeOptions& aOptions)
   return SubtreeRoot();
 }
 
+// TODO: was marked as constant.
+nsINode*
+nsINode::GetParentOrHostNode()
+{
+  if (mParent) {
+    return mParent;
+  }
+
+  ShadowRoot* shadowRoot = ShadowRoot::FromNode(this);
+  return shadowRoot ? shadowRoot->GetHost() : nullptr;
+}
+
 nsINode*
 nsINode::SubtreeRoot() const
 {
@@ -1543,32 +1555,25 @@ nsINode::SetExplicitBaseURI(nsIURI* aURI)
   return rv;
 }
 
-static nsresult
-AdoptNodeIntoOwnerDoc(nsINode *aParent, nsINode *aNode)
+static void
+AdoptNodeIntoOwnerDoc(nsINode *aParent, nsINode *aNode, ErrorResult& aError)
 {
   NS_ASSERTION(!aNode->GetParentNode(),
                "Should have removed from parent already");
 
   nsIDocument *doc = aParent->OwnerDoc();
 
-  nsresult rv;
-  nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(doc, &rv);
-  NS_ENSURE_SUCCESS(rv, rv);
+  DebugOnly<nsINode*> adoptedNode = doc->AdoptNode(*aNode, aError);
 
-  nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode, &rv);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  nsCOMPtr<nsIDOMNode> adoptedNode;
-  rv = domDoc->AdoptNode(node, getter_AddRefs(adoptedNode));
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  NS_ASSERTION(aParent->OwnerDoc() == doc,
-               "ownerDoc chainged while adopting");
-  NS_ASSERTION(adoptedNode == node, "Uh, adopt node changed nodes?");
-  NS_ASSERTION(aParent->OwnerDoc() == aNode->OwnerDoc(),
+#ifdef DEBUG
+  if (!aError.Failed()) {
+    MOZ_ASSERT(aParent->OwnerDoc() == doc,
+               "ownerDoc changed while adopting");
+    MOZ_ASSERT(adoptedNode == aNode, "Uh, adopt node changed nodes?");
+    MOZ_ASSERT(aParent->OwnerDoc() == aNode->OwnerDoc(),
                "ownerDocument changed again after adopting!");
-
-  return NS_OK;
+  }
+#endif // DEBUG
 }
 
 static nsresult
@@ -1593,19 +1598,20 @@ ReparentWrappersInSubtree(nsIContent* aRoot)
 
   rootedGlobal = xpc::GetXBLScope(cx, rootedGlobal);
 
-  nsresult rv;
+  ErrorResult rv;
   JS::Rooted<JSObject*> reflector(cx);
   for (nsIContent* cur = aRoot; cur; cur = cur->GetNextNode(aRoot)) {
     if ((reflector = cur->GetWrapper())) {
       JSAutoCompartment ac(cx, reflector);
-      rv = ReparentWrapper(cx, reflector);
-      if NS_FAILED(rv) {
+      ReparentWrapper(cx, reflector, rv);
+      rv.WouldReportJSException();
+      if (rv.Failed()) {
         // We _could_ consider BlastSubtreeToPieces here, but it's not really
         // needed.  Having some nodes in here accessible to content while others
         // are not is probably OK.  We just need to fail out of the actual
         // insertion, so they're not in the DOM.  Returning a failure here will
         // do that.
-        return rv;
+        return rv.StealNSResult();
       }
     }
   }
@@ -1619,7 +1625,6 @@ nsINode::doInsertChildAt(nsIContent* aKid, uint32_t aIndex,
 {
   NS_PRECONDITION(!aKid->GetParentNode(),
                   "Inserting node that already has parent");
-  nsresult rv;
 
   // The id-handling code, and in the future possibly other code, need to
   // react to unexpected attribute changes.
@@ -1630,15 +1635,23 @@ nsINode::doInsertChildAt(nsIContent* aKid, uint32_t aIndex,
   mozAutoDocUpdate updateBatch(GetComposedDoc(), UPDATE_CONTENT_MODEL, aNotify);
 
   if (OwnerDoc() != aKid->OwnerDoc()) {
-    rv = AdoptNodeIntoOwnerDoc(this, aKid);
-    NS_ENSURE_SUCCESS(rv, rv);
+    ErrorResult error;
+    AdoptNodeIntoOwnerDoc(this, aKid, error);
+
+    // Need to WouldReportJSException() if our callee can throw a JS
+    // exception (which it can) and we're neither propagating the
+    // error out nor unconditionally suppressing it.
+    error.WouldReportJSException();
+    if (NS_WARN_IF(error.Failed())) {
+      return error.StealNSResult();
+    }
   }
 
   uint32_t childCount = aChildArray.ChildCount();
   NS_ENSURE_TRUE(aIndex <= childCount, NS_ERROR_ILLEGAL_VALUE);
   bool isAppend = (aIndex == childCount);
 
-  rv = aChildArray.InsertChildAt(aKid, aIndex);
+  nsresult rv = aChildArray.InsertChildAt(aKid, aIndex);
   NS_ENSURE_SUCCESS(rv, rv);
   if (aIndex == 0) {
     mFirstChild = aKid;
@@ -2475,7 +2488,7 @@ nsINode::ReplaceOrInsertBefore(bool aReplace, nsINode* aNewChild,
   // inserting them w/o calling AdoptNode().
   nsIDocument* doc = OwnerDoc();
   if (doc != newContent->OwnerDoc()) {
-    aError = AdoptNodeIntoOwnerDoc(this, aNewChild);
+    AdoptNodeIntoOwnerDoc(this, aNewChild, aError);
     if (aError.Failed()) {
       return nullptr;
     }
@@ -2879,9 +2892,9 @@ FindMatchingElementsWithId(const nsAString& aId, nsINode* aRoot,
       // We have an element with the right id and it's a strict descendant
       // of aRoot.  Make sure it really matches the selector.
       if (!aMatchInfo ||
-          nsCSSRuleProcessor::SelectorListMatches(element,
-                                                  aMatchInfo->mMatchContext,
-                                                  aMatchInfo->mSelectorList)) {
+          nsCSSRuleProcessor::RestrictedSelectorListMatches(element,
+                                                            aMatchInfo->mMatchContext,
+                                                            aMatchInfo->mSelectorList)) {
         aList.AppendElement(element);
         if (onlyFirstMatch) {
           return;
@@ -2932,9 +2945,9 @@ FindMatchingElements(nsINode* aRoot, nsCSSSelectorList* aSelectorList, T &aList,
        cur;
        cur = cur->GetNextNode(aRoot)) {
     if (cur->IsElement() &&
-        nsCSSRuleProcessor::SelectorListMatches(cur->AsElement(),
-                                                matchingContext,
-                                                aSelectorList)) {
+        nsCSSRuleProcessor::RestrictedSelectorListMatches(cur->AsElement(),
+                                                          matchingContext,
+                                                          aSelectorList)) {
       if (onlyFirstMatch) {
         aList.AppendElement(cur->AsElement());
         return;
@@ -3072,9 +3085,7 @@ nsINode::WrapObject(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
 already_AddRefed<nsINode>
 nsINode::CloneNode(bool aDeep, ErrorResult& aError)
 {
-  nsCOMPtr<nsINode> result;
-  aError = nsNodeUtils::CloneNodeImpl(this, aDeep, getter_AddRefs(result));
-  return result.forget();
+  return nsNodeUtils::CloneNodeImpl(this, aDeep, aError);
 }
 
 nsDOMAttributeMap*

dom/base/nsINode.h

@@ -942,6 +942,12 @@ public:
     return mParent;
   }
 
+  /**
+   * This is similar to above, but in case 'this' is ShadowRoot, we return its
+   * host element.
+   */
+  nsINode* GetParentOrHostNode();
+
   /**
    * Returns the node that is the parent of this node in the flattened
    * tree. This differs from the normal parent if the node is filtered