--- a/.cron.yml
+++ b/.cron.yml
@@ -20,8 +20,18 @@ jobs:
           treeherder-symbol: Na
           triggered-by: nightly
           target-tasks-method: nightly_fennec
       run-on-projects:
           - mozilla-central
           - date
       when: []  # never (temporary)
 
+    - name: nightly-mochitest-valgrind
+      job:
+          type: decision-task
+          treeherder-symbol: Vg
+          target-tasks-method: mochitest_valgrind
+      run-on-projects:
+          - mozilla-central
+      when:
+          - {hour: 16, minute: 0}
+          - {hour: 4, minute: 0}

--- a/.eslintignore
+++ b/.eslintignore
@@ -110,17 +110,16 @@ devtools/server/actors/object.js
 devtools/server/actors/script.js
 devtools/server/actors/styleeditor.js
 devtools/server/actors/stylesheets.js
 devtools/server/tests/browser/**
 !devtools/server/tests/browser/browser_webextension_inspected_window.js
 devtools/server/tests/mochitest/**
 devtools/server/tests/unit/**
 devtools/shared/heapsnapshot/**
-devtools/shared/transport/tests/unit/**
 devtools/shared/webconsole/test/**
 
 # Ignore devtools pre-processed files
 devtools/client/framework/toolbox-process-window.js
 devtools/client/performance/system.js
 devtools/client/webide/webide-prefs.js
 devtools/client/preferences/**
 

--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -698,16 +698,17 @@
                    aria-label="&urlbar.viewSiteInfo.label;"
                    onclick="gIdentityHandler.handleIdentityButtonEvent(event);"
                    onkeypress="gIdentityHandler.handleIdentityButtonEvent(event);"
                    ondragstart="gIdentityHandler.onDragStart(event);">
                 <image id="identity-icon"
                        consumeanchor="identity-box"
                        onclick="PageProxyClickHandler(event);"/>
                 <image id="sharing-icon" mousethrough="always"/>
+                <image id="tracking-protection-icon"/>
                 <box id="blocked-permissions-container" align="center">
                   <image data-permission-id="geo" class="blocked-permission-icon geo-icon" role="button"
                          tooltiptext="&urlbar.geolocationBlocked.tooltip;"/>
                   <image data-permission-id="desktop-notification" class="blocked-permission-icon desktop-notification-icon" role="button"
                          tooltiptext="&urlbar.webNotificationsBlocked.tooltip;"/>
                   <image data-permission-id="camera" class="blocked-permission-icon camera-icon" role="button"
                          tooltiptext="&urlbar.cameraBlocked.tooltip;"/>
                   <image data-permission-id="indexedDB" class="blocked-permission-icon indexedDB-icon" role="button"
@@ -746,17 +747,16 @@
                          tooltiptext="&urlbar.servicesNotificationAnchor.tooltip;"/>
                   <image id="translate-notification-icon" class="notification-anchor-icon translation-icon" role="button"
                          tooltiptext="&urlbar.translateNotificationAnchor.tooltip;"/>
                   <image id="translated-notification-icon" class="notification-anchor-icon translation-icon in-use" role="button"
                          tooltiptext="&urlbar.translatedNotificationAnchor.tooltip;"/>
                   <image id="eme-notification-icon" class="notification-anchor-icon drm-icon" role="button"
                          tooltiptext="&urlbar.emeNotificationAnchor.tooltip;"/>
                 </box>
-                <image id="tracking-protection-icon"/>
                 <image id="connection-icon"/>
                 <hbox id="identity-icon-labels">
                   <label id="identity-icon-label" class="plain" flex="1"/>
                   <label id="identity-icon-country-label" class="plain"/>
                 </hbox>
               </box>
               <box id="urlbar-display-box" align="center">
                 <label id="switchtab" class="urlbar-display urlbar-display-switchtab" value="&urlbar.switchToTab.label;"/>

--- a/browser/base/content/test/webrtc/browser_devices_get_user_media_screen.js
+++ b/browser/base/content/test/webrtc/browser_devices_get_user_media_screen.js
@@ -316,17 +316,17 @@ var gTests = [
     yield checkSharingUI({audio: true, screen: "Screen"});
     yield closeStream();
   }
 },
 
 
 {
   desc: "getUserMedia screen: clicking through without selecting a screen denies",
-  run: function* checkReloading() {
+  run: function* checkClickThroughDenies() {
     let promise = promisePopupNotificationShown("webRTC-shareDevices");
     yield promiseRequestDevice(false, true, null, "screen");
     yield promise;
     yield expectObserverCalled("getUserMedia:request");
     checkDeviceSelectors(false, false, true);
 
     yield promiseMessage(permissionError, () => {
       PopupNotifications.panel.firstChild.button.click();

--- a/browser/base/content/test/webrtc/head.js
+++ b/browser/base/content/test/webrtc/head.js
@@ -402,22 +402,24 @@ function* closeStream(aAlreadyClosed, aF
   if (promises)
     yield Promise.all(promises);
 
   yield* assertWebRTCIndicatorStatus(null);
 }
 
 function* reloadAndAssertClosedStreams() {
   info("reloading the web page");
-  let promise = promiseObserverCalled("recording-device-events");
+  let promises = [
+    promiseObserverCalled("recording-device-events"),
+    promiseObserverCalled("recording-window-ended")
+  ];
   yield ContentTask.spawn(gBrowser.selectedBrowser, null,
                           "() => content.location.reload()");
-  yield promise;
+  yield Promise.all(promises);
 
-  yield expectObserverCalled("recording-window-ended");
   yield expectNoObserverCalled();
   yield checkNotSharing();
 }
 
 function checkDeviceSelectors(aAudio, aVideo, aScreen) {
   let micSelector = document.getElementById("webRTC-selectMicrophone");
   if (aAudio)
     ok(!micSelector.hidden, "microphone selector visible");

new file mode 100644
--- /dev/null
+++ b/browser/config/mozconfigs/linux64/debug-qr
@@ -0,0 +1,3 @@
+. "$topsrcdir/browser/config/mozconfigs/linux64/debug"
+
+ac_add_options --enable-webrender

new file mode 100644
--- /dev/null
+++ b/browser/config/mozconfigs/linux64/opt-qr
@@ -0,0 +1,3 @@
+. "$topsrcdir/browser/config/mozconfigs/linux64/nightly"
+
+ac_add_options --enable-webrender

new file mode 100644
--- /dev/null
+++ b/browser/config/mozconfigs/macosx64/debug-qr
@@ -0,0 +1,3 @@
+. "$topsrcdir/browser/config/mozconfigs/macosx64/debug"
+
+ac_add_options --enable-webrender

new file mode 100644
--- /dev/null
+++ b/browser/config/mozconfigs/macosx64/opt-qr
@@ -0,0 +1,3 @@
+. "$topsrcdir/browser/config/mozconfigs/macosx64/nightly"
+
+ac_add_options --enable-webrender

new file mode 100644
--- /dev/null
+++ b/browser/config/mozconfigs/win64/debug-qr
@@ -0,0 +1,3 @@
+. "$topsrcdir/browser/config/mozconfigs/win64/debug"
+
+ac_add_options --enable-webrender

new file mode 100644
--- /dev/null
+++ b/browser/config/mozconfigs/win64/opt-qr
@@ -0,0 +1,3 @@
+. "$topsrcdir/browser/config/mozconfigs/win64/nightly"
+
+ac_add_options --enable-webrender

--- a/browser/modules/E10SUtils.jsm
+++ b/browser/modules/E10SUtils.jsm
@@ -8,18 +8,22 @@ this.EXPORTED_SYMBOLS = ["E10SUtils"];
 
 const {interfaces: Ci, utils: Cu, classes: Cc} = Components;
 
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 
 XPCOMUtils.defineLazyPreferenceGetter(this, "useRemoteWebExtensions",
                                       "extensions.webextensions.remote", false);
+XPCOMUtils.defineLazyPreferenceGetter(this, "useSeparateFileUriProcess",
+                                      "browser.tabs.remote.separateFileUriProcess", false);
 XPCOMUtils.defineLazyModuleGetter(this, "Utils",
                                   "resource://gre/modules/sessionstore/Utils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "console",
+                                  "resource://gre/modules/Console.jsm");
 
 function getAboutModule(aURL) {
   // Needs to match NS_GetAboutModuleName
   let moduleName = aURL.path.replace(/[#?].*/, "").toLowerCase();
   let contract = "@mozilla.org/network/protocol/about;1?what=" + moduleName;
   try {
     return Cc[contract].getService(Ci.nsIAboutModule);
   } catch (e) {
@@ -51,112 +55,125 @@ this.E10SUtils = {
 
   canLoadURIInProcess(aURL, aProcess) {
     let remoteType = aProcess == Ci.nsIXULRuntime.PROCESS_TYPE_CONTENT
                      ? DEFAULT_REMOTE_TYPE : NOT_REMOTE;
     return remoteType == this.getRemoteTypeForURI(aURL, true, remoteType);
   },
 
   getRemoteTypeForURI(aURL, aMultiProcess,
-                                aPreferredRemoteType = DEFAULT_REMOTE_TYPE) {
+                      aPreferredRemoteType = DEFAULT_REMOTE_TYPE) {
     if (!aMultiProcess) {
       return NOT_REMOTE;
     }
 
     // loadURI in browser.xml treats null as about:blank
     if (!aURL) {
       aURL = "about:blank";
     }
 
-    // Javascript urls can load in any process, they apply to the current document
-    if (aURL.startsWith("javascript:")) {
-      return aPreferredRemoteType;
-    }
-
-    // We need data: URI's to load in a remote process, because some of our
-    // tests rely on this. For blob: URI's, load them in their originating
-    // process unless it is non-remote. In that case, favor a remote (sandboxed)
-    // process with fewer privileges to limit exposure.
-    if (aURL.startsWith("data:") || aURL.startsWith("blob:")) {
-      return aPreferredRemoteType == NOT_REMOTE ? DEFAULT_REMOTE_TYPE
-                                                : aPreferredRemoteType;
-    }
-
-    if (aURL.startsWith("file:")) {
-      return Services.prefs.getBoolPref("browser.tabs.remote.separateFileUriProcess")
-             ? FILE_REMOTE_TYPE : DEFAULT_REMOTE_TYPE;
+    let uri;
+    try {
+      uri = Services.io.newURI(aURL);
+    } catch (e) {
+      // If we have an invalid URI, it's still possible that it might get
+      // fixed-up into a valid URI later on. However, we don't want to return
+      // aPreferredRemoteType here, in case the URI gets fixed-up into
+      // something that wouldn't normally run in that process.
+      return DEFAULT_REMOTE_TYPE;
     }
 
-    if (aURL.startsWith("about:")) {
-      // We need to special case about:blank because it needs to load in any.
-      if (aURL == "about:blank") {
-        return aPreferredRemoteType;
-      }
+    return this.getRemoteTypeForURIObject(uri, aMultiProcess,
+                                          aPreferredRemoteType);
+  },
 
-      let url = Services.io.newURI(aURL);
-      let module = getAboutModule(url);
-      // If the module doesn't exist then an error page will be loading, that
-      // should be ok to load in any process
-      if (!module) {
-        return aPreferredRemoteType;
-      }
-
-      let flags = module.getURIFlags(url);
-      if (flags & Ci.nsIAboutModule.URI_MUST_LOAD_IN_CHILD) {
-        return DEFAULT_REMOTE_TYPE;
-      }
-
-      // If the about page can load in parent or child, it should be safe to
-      // load in any remote type.
-      if (flags & Ci.nsIAboutModule.URI_CAN_LOAD_IN_CHILD) {
-        return aPreferredRemoteType;
-      }
-
+  getRemoteTypeForURIObject(aURI, aMultiProcess,
+                            aPreferredRemoteType = DEFAULT_REMOTE_TYPE) {
+    if (!aMultiProcess) {
       return NOT_REMOTE;
     }
 
-    if (aURL.startsWith("chrome:")) {
-      let url;
-      try {
-        // This can fail for invalid Chrome URIs, in which case we will end up
-        // not loading anything anyway.
-        url = Services.io.newURI(aURL);
-      } catch (ex) {
+    switch (aURI.scheme) {
+      case "javascript":
+        // javascript URIs can load in any, they apply to the current document.
         return aPreferredRemoteType;
-      }
+
+      case "data":
+      case "blob":
+        // We need data: and blob: URIs to load in any remote process, because
+        // they need to be able to load in whatever is the current process
+        // unless it is non-remote. In that case we don't want to load them in
+        // the parent process, so we load them in the default remote process,
+        // which is sandboxed and limits any risk.
+        return aPreferredRemoteType == NOT_REMOTE ? DEFAULT_REMOTE_TYPE
+                                                  : aPreferredRemoteType;
 
-      let chromeReg = Cc["@mozilla.org/chrome/chrome-registry;1"].
-                      getService(Ci.nsIXULChromeRegistry);
-      if (chromeReg.mustLoadURLRemotely(url)) {
-        return DEFAULT_REMOTE_TYPE;
-      }
+      case "file":
+        return useSeparateFileUriProcess ? FILE_REMOTE_TYPE
+                                         : DEFAULT_REMOTE_TYPE;
+
+      case "about":
+        let module = getAboutModule(aURI);
+        // If the module doesn't exist then an error page will be loading, that
+        // should be ok to load in any process
+        if (!module) {
+          return aPreferredRemoteType;
+        }
+
+        let flags = module.getURIFlags(aURI);
+        if (flags & Ci.nsIAboutModule.URI_MUST_LOAD_IN_CHILD) {
+          return DEFAULT_REMOTE_TYPE;
+        }
 
-      if (chromeReg.canLoadURLRemotely(url) &&
-          aPreferredRemoteType != NOT_REMOTE) {
-        return DEFAULT_REMOTE_TYPE;
-      }
+        // If the about page can load in parent or child, it should be safe to
+        // load in any remote type.
+        if (flags & Ci.nsIAboutModule.URI_CAN_LOAD_IN_CHILD) {
+          return aPreferredRemoteType;
+        }
+
+        return NOT_REMOTE;
 
-      return NOT_REMOTE;
-    }
+      case "chrome":
+        let chromeReg = Cc["@mozilla.org/chrome/chrome-registry;1"].
+                        getService(Ci.nsIXULChromeRegistry);
+        if (chromeReg.mustLoadURLRemotely(aURI)) {
+          return DEFAULT_REMOTE_TYPE;
+        }
+
+        if (chromeReg.canLoadURLRemotely(aURI) &&
+            aPreferredRemoteType != NOT_REMOTE) {
+          return DEFAULT_REMOTE_TYPE;
+        }
 
-    if (aURL.startsWith("moz-extension:")) {
-      return useRemoteWebExtensions ? EXTENSION_REMOTE_TYPE : NOT_REMOTE;
-    }
+        return NOT_REMOTE;
+
+      case "moz-extension":
+        return useRemoteWebExtensions ? EXTENSION_REMOTE_TYPE : NOT_REMOTE;
 
-    if (aURL.startsWith("view-source:")) {
-      return this.getRemoteTypeForURI(aURL.substr("view-source:".length),
-                                      aMultiProcess, aPreferredRemoteType);
+      default:
+        // For any other nested URIs, we use the innerURI to determine the
+        // remote type. In theory we should use the innermost URI, but some URIs
+        // have fake inner URIs (e.g. about URIs with inner moz-safe-about) and
+        // if such URIs are wrapped in other nested schemes like view-source:,
+        // we don't want to "skip" past "about:" by going straight to the
+        // innermost URI. Any URIs like this will need to be handled in the
+        // cases above, so we don't still end up using the fake inner URI here.
+        if (aURI instanceof Ci.nsINestedURI) {
+          let innerURI = aURI.QueryInterface(Ci.nsINestedURI).innerURI;
+          return this.getRemoteTypeForURIObject(innerURI, aMultiProcess,
+                                                aPreferredRemoteType);
+        }
+
+        return validatedWebRemoteType(aPreferredRemoteType);
     }
-
-    return validatedWebRemoteType(aPreferredRemoteType);
   },
 
   shouldLoadURIInThisProcess(aURI) {
     let remoteType = Services.appinfo.remoteType;
-    return remoteType == this.getRemoteTypeForURI(aURI.spec, true, remoteType);
+    return remoteType == this.getRemoteTypeForURIObject(aURI, true, remoteType);
   },
 
   shouldLoadURI(aDocShell, aURI, aReferrer) {
     // Inner frames should always load in the current process
     if (aDocShell.QueryInterface(Ci.nsIDocShellTreeItem).sameTypeParent)
       return true;
 
     // If we are in a Large-Allocation process, and it wouldn't be content visible

new file mode 100644
--- /dev/null
+++ b/browser/modules/test/xpcshell/test_E10SUtils_nested_URIs.js
@@ -0,0 +1,94 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+
+const {utils: Cu, interfaces: Ci} = Components;
+
+Cu.import("resource:///modules/E10SUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+var TEST_PREFERRED_REMOTE_TYPES = [
+  E10SUtils.WEB_REMOTE_TYPE,
+  E10SUtils.NOT_REMOTE,
+  "fakeRemoteType",
+]
+
+// These test cases give a nestedURL and a plainURL that should always load in
+// the same remote type. By making these tests comparisons, they should work
+// with any pref combination.
+var TEST_CASES = [
+  {
+    nestedURL: "jar:file:///some.file!/",
+    plainURL: "file:///some.file",
+  },
+  {
+    nestedURL: "jar:jar:file:///some.file!/!/",
+    plainURL: "file:///some.file",
+  },
+  {
+    nestedURL: "jar:http://some.site/file!/",
+    plainURL: "http://some.site/file",
+  },
+  {
+    nestedURL: "feed:http://some.site",
+    plainURL: "http://some.site",
+  },
+  {
+    nestedURL: "pcast:http://some.site",
+    plainURL: "http://some.site",
+  },
+  {
+    nestedURL: "view-source:http://some.site",
+    plainURL: "http://some.site",
+  },
+  {
+    nestedURL: "view-source:file:///some.file",
+    plainURL: "file:///some.file",
+  },
+  {
+    nestedURL: "view-source:about:home",
+    plainURL: "about:home",
+  },
+  {
+    nestedURL: "view-source:about:robots",
+    plainURL: "about:robots",
+  },
+  {
+    nestedURL: "view-source:feed:http://some.site",
+    plainURL: "http://some.site",
+  },
+  {
+    nestedURL: "view-source:pcast:http://some.site",
+    plainURL: "http://some.site",
+  },
+]
+
+function run_test() {
+  for (let testCase of TEST_CASES) {
+    for (let preferredRemoteType of TEST_PREFERRED_REMOTE_TYPES) {
+      let plainUri = Services.io.newURI(testCase.plainURL);
+      let plainRemoteType =
+        E10SUtils.getRemoteTypeForURIObject(plainUri, true, preferredRemoteType);
+
+      let nestedUri = Services.io.newURI(testCase.nestedURL);
+      let nestedRemoteType =
+        E10SUtils.getRemoteTypeForURIObject(nestedUri, true, preferredRemoteType);
+
+      let nestedStr = nestedUri.scheme + ":";
+      do {
+        nestedUri = nestedUri.QueryInterface(Ci.nsINestedURI).innerURI;
+        if (nestedUri.scheme == "about") {
+          nestedStr += nestedUri.spec;
+          break;
+        }
+
+        nestedStr += nestedUri.scheme + ":";
+      } while (nestedUri instanceof Ci.nsINestedURI);
+
+      let plainStr = plainUri.scheme == "about" ? plainUri.spec
+                                                : plainUri.scheme + ":";
+      equal(nestedRemoteType, plainRemoteType,
+            `Check that ${nestedStr} loads in same remote type as ${plainStr}`
+            + ` with preferred remote type: ${preferredRemoteType}`);
+    }
+  }
+}

--- a/browser/modules/test/xpcshell/xpcshell.ini
+++ b/browser/modules/test/xpcshell/xpcshell.ini
@@ -1,10 +1,11 @@
 [DEFAULT]
 head =
 firefox-appdir = browser
 skip-if = toolkit == 'android'
 
 [test_AttributionCode.js]
 skip-if = os != 'win'
 [test_DirectoryLinksProvider.js]
+[test_E10SUtils_nested_URIs.js]
 [test_SitePermissions.js]
 [test_LaterRun.js]

--- a/config/system-headers
+++ b/config/system-headers
@@ -484,16 +484,17 @@ ft2build.h
 fts.h
 gconf/gconf-client.h
 Gdiplus.h
 gdk/gdk.h
 gdk/gdkkeysyms.h
 gdk/gdkprivate.h
 gdk/gdkx.h
 gdk/gdkdirectfb.h
+gdk/gdkwayland.h
 gdk-pixbuf/gdk-pixbuf.h
 Gestalt.h
 getopt.h
 glibconfig.h
 glib.h
 glib-object.h
 gmodule.h
 gnome.h

--- a/devtools/shared/transport/tests/unit/head_dbg.js
+++ b/devtools/shared/transport/tests/unit/head_dbg.js
@@ -1,262 +1,157 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 "use strict";
 
+/* exported Cr, CC, NetUtil, defer, errorCount, initTestDebuggerServer,
+            writeTestTempFile, socket_transport, local_transport, really_long
+*/
+
 var Cc = Components.classes;
 var Ci = Components.interfaces;
 var Cu = Components.utils;
 var Cr = Components.results;
 var CC = Components.Constructor;
 
 const { require } =
   Cu.import("resource://devtools/shared/Loader.jsm", {});
 const { NetUtil } = require("resource://gre/modules/NetUtil.jsm");
 const promise = require("promise");
 const defer = require("devtools/shared/defer");
 const { Task } = require("devtools/shared/task");
 
 const Services = require("Services");
-const DevToolsUtils = require("devtools/shared/DevToolsUtils");
 
 // We do not want to log packets by default, because in some tests,
 // we can be sending large amounts of data. The test harness has
 // trouble dealing with logging all the data, and we end up with
 // intermittent time outs (e.g. bug 775924).
 // Services.prefs.setBoolPref("devtools.debugger.log", true);
 // Services.prefs.setBoolPref("devtools.debugger.log.verbose", true);
 // Enable remote debugging for the relevant tests.
 Services.prefs.setBoolPref("devtools.debugger.remote-enabled", true);
 
 const { DebuggerServer } = require("devtools/server/main");
 const { DebuggerClient } = require("devtools/shared/client/main");
 
-function testExceptionHook(ex) {
-  try {
-    do_report_unexpected_exception(ex);
-  } catch (ex) {
-    return {throw: ex};
+// Convert an nsIScriptError 'flags' value into an appropriate string.
+function scriptErrorFlagsToKind(flags) {
+  let kind;
+  if (flags & Ci.nsIScriptError.warningFlag) {
+    kind = "warning";
   }
-  return undefined;
-}
+  if (flags & Ci.nsIScriptError.exceptionFlag) {
+    kind = "exception";
+  } else {
+    kind = "error";
+  }
 
-// Convert an nsIScriptError 'aFlags' value into an appropriate string.
-function scriptErrorFlagsToKind(aFlags) {
-  var kind;
-  if (aFlags & Ci.nsIScriptError.warningFlag)
-    kind = "warning";
-  if (aFlags & Ci.nsIScriptError.exceptionFlag)
-    kind = "exception";
-  else
-    kind = "error";
-
-  if (aFlags & Ci.nsIScriptError.strictFlag)
+  if (flags & Ci.nsIScriptError.strictFlag) {
     kind = "strict " + kind;
+  }
 
   return kind;
 }
 
 // Register a console listener, so console messages don't just disappear
 // into the ether.
 var errorCount = 0;
 var listener = {
-  observe: function (aMessage) {
+  observe: function (message) {
     errorCount++;
+    let string = "";
     try {
       // If we've been given an nsIScriptError, then we can print out
       // something nicely formatted, for tools like Emacs to pick up.
-      var scriptError = aMessage.QueryInterface(Ci.nsIScriptError);
-      dump(aMessage.sourceName + ":" + aMessage.lineNumber + ": " +
-           scriptErrorFlagsToKind(aMessage.flags) + ": " +
-           aMessage.errorMessage + "\n");
-      var string = aMessage.errorMessage;
+      message.QueryInterface(Ci.nsIScriptError);
+      dump(message.sourceName + ":" + message.lineNumber + ": " +
+           scriptErrorFlagsToKind(message.flags) + ": " +
+           message.errorMessage + "\n");
+      string = message.errorMessage;
     } catch (x) {
       // Be a little paranoid with message, as the whole goal here is to lose
       // no information.
       try {
-        var string = "" + aMessage.message;
-      } catch (x) {
-        var string = "<error converting error message to string>";
+        string = message.message;
+      } catch (e) {
+        string = "<error converting error message to string>";
       }
     }
 
     // Make sure we exit all nested event loops so that the test can finish.
     while (DebuggerServer.xpcInspector.eventLoopNestLevel > 0) {
       DebuggerServer.xpcInspector.exitNestedEventLoop();
     }
 
     // Throw in most cases, but ignore the "strict" messages
-    if (!(aMessage.flags & Ci.nsIScriptError.strictFlag)) {
+    if (!(message.flags & Ci.nsIScriptError.strictFlag)) {
       do_throw("head_dbg.js got console message: " + string + "\n");
     }
   }
 };
 
 var consoleService = Cc["@mozilla.org/consoleservice;1"]
                      .getService(Ci.nsIConsoleService);
 consoleService.registerListener(listener);
 
-function check_except(func) {
-  try {
-    func();
-  } catch (e) {
-    do_check_true(true);
-    return;
-  }
-  dump("Should have thrown an exception: " + func.toString());
-  do_check_true(false);
-}
-
-function testGlobal(aName) {
-  let systemPrincipal = Cc["@mozilla.org/systemprincipal;1"]
-    .createInstance(Ci.nsIPrincipal);
-
-  let sandbox = Cu.Sandbox(systemPrincipal);
-  sandbox.__name = aName;
-  return sandbox;
-}
-
-function addTestGlobal(aName)
-{
-  let global = testGlobal(aName);
-  DebuggerServer.addTestGlobal(global);
-  return global;
-}
-
-// List the DebuggerClient |aClient|'s tabs, look for one whose title is
-// |aTitle|, and apply |aCallback| to the packet's entry for that tab.
-function getTestTab(aClient, aTitle, aCallback) {
-  aClient.listTabs(function (aResponse) {
-    for (let tab of aResponse.tabs) {
-      if (tab.title === aTitle) {
-        aCallback(tab);
-        return;
-      }
-    }
-    aCallback(null);
-  });
-}
-
-// Attach to |aClient|'s tab whose title is |aTitle|; pass |aCallback| the
-// response packet and a TabClient instance referring to that tab.
-function attachTestTab(aClient, aTitle, aCallback) {
-  getTestTab(aClient, aTitle, function (aTab) {
-    aClient.attachTab(aTab.actor, aCallback);
-  });
-}
-
-// Attach to |aClient|'s tab whose title is |aTitle|, and then attach to
-// that tab's thread. Pass |aCallback| the thread attach response packet, a
-// TabClient referring to the tab, and a ThreadClient referring to the
-// thread.
-function attachTestThread(aClient, aTitle, aCallback) {
-  attachTestTab(aClient, aTitle, function (aResponse, aTabClient) {
-    function onAttach(aResponse, aThreadClient) {
-      aCallback(aResponse, aTabClient, aThreadClient);
-    }
-    aTabClient.attachThread({ useSourceMaps: true }, onAttach);
-  });
-}
-
-// Attach to |aClient|'s tab whose title is |aTitle|, attach to the tab's
-// thread, and then resume it. Pass |aCallback| the thread's response to
-// the 'resume' packet, a TabClient for the tab, and a ThreadClient for the
-// thread.
-function attachTestTabAndResume(aClient, aTitle, aCallback) {
-  attachTestThread(aClient, aTitle, function (aResponse, aTabClient, aThreadClient) {
-    aThreadClient.resume(function (aResponse) {
-      aCallback(aResponse, aTabClient, aThreadClient);
-    });
-  });
-}
-
 /**
  * Initialize the testing debugger server.
  */
 function initTestDebuggerServer() {
   DebuggerServer.registerModule("devtools/server/actors/script", {
     prefix: "script",
     constructor: "ScriptActor",
     type: { global: true, tab: true }
   });
   DebuggerServer.registerModule("xpcshell-test/testactors");
   // Allow incoming connections.
   DebuggerServer.init();
 }
 
-function finishClient(aClient) {
-  aClient.close().then(function () {
-    do_test_finished();
-  });
-}
-
-/**
- * Takes a relative file path and returns the absolute file url for it.
- */
-function getFileUrl(aName, aAllowMissing = false) {
-  let file = do_get_file(aName, aAllowMissing);
-  return Services.io.newFileURI(file).spec;
-}
-
-/**
- * Returns the full path of the file with the specified name in a
- * platform-independent and URL-like form.
- */
-function getFilePath(aName, aAllowMissing = false) {
-  let file = do_get_file(aName, aAllowMissing);
-  let path = Services.io.newFileURI(file).spec;
-  let filePrePath = "file://";
-  if ("nsILocalFileWin" in Ci &&
-      file instanceof Ci.nsILocalFileWin) {
-    filePrePath += "/";
-  }
-  return path.slice(filePrePath.length);
-}
-
 /**
  * Wrapper around do_get_file to prefix files with the name of current test to
  * avoid collisions when running in parallel.
  */
 function getTestTempFile(fileName, allowMissing) {
   let thisTest = _TEST_FILE.toString().replace(/\\/g, "/");
   thisTest = thisTest.substring(thisTest.lastIndexOf("/") + 1);
   thisTest = thisTest.replace(/\..*$/, "");
   return do_get_file(fileName + "-" + thisTest, allowMissing);
 }
 
-function writeTestTempFile(aFileName, aContent) {
-  let file = getTestTempFile(aFileName, true);
+function writeTestTempFile(fileName, content) {
+  let file = getTestTempFile(fileName, true);
   let stream = Cc["@mozilla.org/network/file-output-stream;1"]
     .createInstance(Ci.nsIFileOutputStream);
   stream.init(file, -1, -1, 0);
   try {
     do {
-      let numWritten = stream.write(aContent, aContent.length);
-      aContent = aContent.slice(numWritten);
-    } while (aContent.length > 0);
+      let numWritten = stream.write(content, content.length);
+      content = content.slice(numWritten);
+    } while (content.length > 0);
   } finally {
     stream.close();
   }
 }
 
 /** * Transport Factories ***/
 
 var socket_transport = Task.async(function* () {
   if (!DebuggerServer.listeningSockets) {
     let AuthenticatorType = DebuggerServer.Authenticators.get("PROMPT");
     let authenticator = new AuthenticatorType.Server();
     authenticator.allowConnection = () => {
       return DebuggerServer.AuthenticationResult.ALLOW;
     };
-    let listener = DebuggerServer.createListener();
-    listener.portOrPath = -1;
-    listener.authenticator = authenticator;
-    yield listener.open();
+    let debuggerListener = DebuggerServer.createListener();
+    debuggerListener.portOrPath = -1;
+    debuggerListener.authenticator = authenticator;
+    yield debuggerListener.open();
   }
   let port = DebuggerServer._listeners[0].port;
   do_print("Debugger server port is " + port);
   return DebuggerClient.socketConnect({ host: "127.0.0.1", port });
 });
 
 function local_transport() {
   return promise.resolve(DebuggerServer.connectPipe());

--- a/devtools/shared/transport/tests/unit/test_bulk_error.js
+++ b/devtools/shared/transport/tests/unit/test_bulk_error.js
@@ -68,18 +68,18 @@ function json_reply(client, response) {
     actor: response.testBulk,
     type: "jsonReply",
     length: reallyLong.length
   });
 
   // Send bulk data to server
   let copyDeferred = defer();
   request.on("bulk-send-ready", ({writer, done}) => {
-    let input = Cc["@mozilla.org/io/string-input-stream;1"].
-                  createInstance(Ci.nsIStringInputStream);
+    let input = Cc["@mozilla.org/io/string-input-stream;1"]
+                  .createInstance(Ci.nsIStringInputStream);
     input.setData(reallyLong, reallyLong.length);
     try {
       writer.copyFrom(input, () => {
         input.close();
         done();
       });
       do_throw(new Error("Copying should fail, the stream is not async."));
     } catch (e) {

--- a/devtools/shared/transport/tests/unit/test_client_server_bulk.js
+++ b/devtools/shared/transport/tests/unit/test_client_server_bulk.js
@@ -145,35 +145,37 @@ var test_bulk_request_cs = Task.async(fu
   let transport = yield transportFactory();
 
   let client = new DebuggerClient(transport);
   client.connect().then(([app, traits]) => {
     do_check_eq(traits.bulk, true);
     client.listTabs(clientDeferred.resolve);
   });
 
+  function bulkSendReadyCallback({copyFrom}) {
+    NetUtil.asyncFetch({
+      uri: NetUtil.newURI(getTestTempFile("bulk-input")),
+      loadUsingSystemPrincipal: true
+    }, input => {
+      copyFrom(input).then(() => {
+        input.close();
+        bulkCopyDeferred.resolve();
+      });
+    });
+  }
+
   clientDeferred.promise.then(response => {
     let request = client.startBulkRequest({
       actor: response.testBulk,
       type: actorType,
       length: really_long().length
     });
 
     // Send bulk data to server
-    request.on("bulk-send-ready", ({copyFrom}) => {
-      NetUtil.asyncFetch({
-        uri: NetUtil.newURI(getTestTempFile("bulk-input")),
-        loadUsingSystemPrincipal: true
-      }, input => {
-        copyFrom(input).then(() => {
-          input.close();
-          bulkCopyDeferred.resolve();
-        });
-      });
-    });
+    request.on("bulk-send-ready", bulkSendReadyCallback);
 
     // Set up reply handling for this type
     replyHandlers[replyType](request).then(() => {
       client.close();
       transport.close();
     });
   }).then(null, do_throw);
 

--- a/devtools/shared/transport/tests/unit/test_dbgsocket.js
+++ b/devtools/shared/transport/tests/unit/test_dbgsocket.js
@@ -1,28 +1,27 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 var gPort;
 var gExtraListener;
 
-function run_test()
-{
+function run_test() {
   do_print("Starting test at " + new Date().toTimeString());
   initTestDebuggerServer();
 
   add_task(test_socket_conn);
   add_task(test_socket_shutdown);
   add_test(test_pipe_conn);
 
   run_next_test();
 }
 
-function* test_socket_conn()
-{
+function* test_socket_conn() {
   do_check_eq(DebuggerServer.listeningSockets, 0);
   let AuthenticatorType = DebuggerServer.Authenticators.get("PROMPT");
   let authenticator = new AuthenticatorType.Server();
   authenticator.allowConnection = () => {
     return DebuggerServer.AuthenticationResult.ALLOW;
   };
   let listener = DebuggerServer.createListener();
   do_check_true(listener);
@@ -48,77 +47,74 @@ function* test_socket_conn()
 
   // Assert that connection settings are available on transport object
   let settings = transport.connectionSettings;
   do_check_eq(settings.host, "127.0.0.1");
   do_check_eq(settings.port, gPort);
 
   let closedDeferred = defer();
   transport.hooks = {
-    onPacket: function (aPacket) {
-      this.onPacket = function (aPacket) {
-        do_check_eq(aPacket.unicode, unicodeString);
+    onPacket: function (packet) {
+      this.onPacket = function ({unicode}) {
+        do_check_eq(unicode, unicodeString);
         transport.close();
       };
       // Verify that things work correctly when bigger than the output
       // transport buffers and when transporting unicode...
       transport.send({to: "root",
                       type: "echo",
                       reallylong: really_long(),
                       unicode: unicodeString});
-      do_check_eq(aPacket.from, "root");
+      do_check_eq(packet.from, "root");
     },
-    onClosed: function (aStatus) {
+    onClosed: function (status) {
       closedDeferred.resolve();
     },
   };
   transport.ready();
   return closedDeferred.promise;
 }
 
-function* test_socket_shutdown()
-{
+function* test_socket_shutdown() {
   do_check_eq(DebuggerServer.listeningSockets, 2);
   gExtraListener.close();
   do_check_eq(DebuggerServer.listeningSockets, 1);
   do_check_true(DebuggerServer.closeAllListeners());
   do_check_eq(DebuggerServer.listeningSockets, 0);
   // Make sure closing the listener twice does nothing.
   do_check_false(DebuggerServer.closeAllListeners());
   do_check_eq(DebuggerServer.listeningSockets, 0);
 
   do_print("Connecting to a server socket at " + new Date().toTimeString());
   try {
-    let transport = yield DebuggerClient.socketConnect({
+    yield DebuggerClient.socketConnect({
       host: "127.0.0.1",
       port: gPort
     });
   } catch (e) {
     if (e.result == Cr.NS_ERROR_CONNECTION_REFUSED ||
         e.result == Cr.NS_ERROR_NET_TIMEOUT) {
       // The connection should be refused here, but on slow or overloaded
       // machines it may just time out.
       do_check_true(true);
       return;
-    } else {
-      throw e;
     }
+    throw e;
   }
 
   // Shouldn't reach this, should never connect.
   do_check_true(false);
 }
 
-function test_pipe_conn()
-{
+function test_pipe_conn() {
   let transport = DebuggerServer.connectPipe();
   transport.hooks = {
-    onPacket: function (aPacket) {
-      do_check_eq(aPacket.from, "root");
+    onPacket: function (packet) {
+      do_check_eq(packet.from, "root");
       transport.close();
     },
-    onClosed: function (aStatus) {
+    onClosed: function (status) {
       run_next_test();
     }
   };
 
   transport.ready();
 }

--- a/devtools/shared/transport/tests/unit/test_dbgsocket_connection_drop.js
+++ b/devtools/shared/transport/tests/unit/test_dbgsocket_connection_drop.js
@@ -2,16 +2,17 @@
  * Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/
  */
 
 /**
  * Bug 755412 - checks if the server drops the connection on an improperly
  * framed packet, i.e. when the length header is invalid.
  */
+"use strict";
 
 const { RawPacket } = require("devtools/shared/transport/packets");
 
 function run_test() {
   do_print("Starting test at " + new Date().toTimeString());
   initTestDebuggerServer();
 
   add_task(test_socket_conn_drops_after_invalid_header);
@@ -56,26 +57,26 @@ var test_helper = Task.async(function* (
   listener.open();
 
   let transport = yield DebuggerClient.socketConnect({
     host: "127.0.0.1",
     port: listener.port
   });
   let closedDeferred = defer();
   transport.hooks = {
-    onPacket: function (aPacket) {
-      this.onPacket = function (aPacket) {
+    onPacket: function (packet) {
+      this.onPacket = function () {
         do_throw(new Error("This connection should be dropped."));
         transport.close();
       };
 
       // Inject the payload directly into the stream.
       transport._outgoing.push(new RawPacket(transport, payload));
       transport._flushOutgoing();
     },
-    onClosed: function (aStatus) {
+    onClosed: function (status) {
       do_check_true(true);
       closedDeferred.resolve();
     },
   };
   transport.ready();
   return closedDeferred.promise;
 });

--- a/devtools/shared/transport/tests/unit/test_delimited_read.js
+++ b/devtools/shared/transport/tests/unit/test_delimited_read.js
@@ -1,10 +1,11 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 const StreamUtils = require("devtools/shared/transport/stream-utils");
 
 const StringInputStream = CC("@mozilla.org/io/string-input-stream;1",
                              "nsIStringInputStream", "setData");
 
 function run_test() {
   add_task(function* () {

--- a/devtools/shared/transport/tests/unit/test_no_bulk.js
+++ b/devtools/shared/transport/tests/unit/test_no_bulk.js
@@ -15,24 +15,22 @@ function run_test() {
   });
 
   run_next_test();
 }
 
 /** * Tests ***/
 
 var test_bulk_send_error = Task.async(function* (transportFactory) {
-  let deferred = defer();
   let transport = yield transportFactory();
 
   let client = new DebuggerClient(transport);
   return client.connect().then(([app, traits]) => {
     do_check_false(traits.bulk);
 
     try {
       client.startBulkRequest();
       do_throw(new Error("Can't use bulk since server doesn't support it"));
     } catch (e) {
       do_check_true(true);
     }
-
   });
 });

--- a/devtools/shared/transport/tests/unit/test_packet.js
+++ b/devtools/shared/transport/tests/unit/test_packet.js
@@ -1,10 +1,11 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 const { JSONPacket, BulkPacket } =
   require("devtools/shared/transport/packets");
 
 function run_test() {
   add_test(test_packet_done);
   run_next_test();
 }

--- a/devtools/shared/transport/tests/unit/test_transport_bulk.js
+++ b/devtools/shared/transport/tests/unit/test_transport_bulk.js
@@ -69,19 +69,19 @@ var test_bulk_transfer_transport = Task.
         clientDeferred.resolve();
       };
       transport.close();
     });
   }
 
   // Client
   transport.hooks = {
-    onPacket: function (aPacket) {
+    onPacket: function (packet) {
       // We've received the initial start up packet
-      do_check_eq(aPacket.from, "root");
+      do_check_eq(packet.from, "root");
 
       // Server
       do_check_eq(Object.keys(DebuggerServer._connections).length, 1);
       do_print(Object.keys(DebuggerServer._connections));
       for (let connId in DebuggerServer._connections) {
         DebuggerServer._connections[connId].onBulkPacket = on_bulk_packet;
       }
 

--- a/devtools/shared/transport/tests/unit/testactors-no-bulk.js
+++ b/devtools/shared/transport/tests/unit/testactors-no-bulk.js
@@ -1,19 +1,20 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 const { RootActor } = require("devtools/server/actors/root");
 const { DebuggerServer } = require("devtools/server/main");
 
 /**
  * Root actor that doesn't have the bulk trait.
  */
-function createRootActor(aConnection) {
-  let root = new RootActor(aConnection, {
+function createRootActor(connection) {
+  let root = new RootActor(connection, {
     globalActorFactories: DebuggerServer.globalActorFactories
   });
   root.applicationType = "xpcshell-tests";
   root.traits = {
     bulk: false
   };
   return root;
 }

--- a/devtools/shared/transport/tests/unit/testactors.js
+++ b/devtools/shared/transport/tests/unit/testactors.js
@@ -1,72 +1,73 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
 
 const { ActorPool, appendExtraActors, createExtraActors } =
   require("devtools/server/actors/common");
 const { RootActor } = require("devtools/server/actors/root");
 const { ThreadActor } = require("devtools/server/actors/script");
 const { DebuggerServer } = require("devtools/server/main");
 const promise = require("promise");
 
 var gTestGlobals = [];
-DebuggerServer.addTestGlobal = function (aGlobal) {
-  gTestGlobals.push(aGlobal);
+DebuggerServer.addTestGlobal = function (global) {
+  gTestGlobals.push(global);
 };
 
 // A mock tab list, for use by tests. This simply presents each global in
 // gTestGlobals as a tab, and the list is fixed: it never calls its
 // onListChanged handler.
 //
 // As implemented now, we consult gTestGlobals when we're constructed, not
 // when we're iterated over, so tests have to add their globals before the
 // root actor is created.
-function TestTabList(aConnection) {
-  this.conn = aConnection;
+function TestTabList(connection) {
+  this.conn = connection;
 
   // An array of actors for each global added with
   // DebuggerServer.addTestGlobal.
   this._tabActors = [];
 
   // A pool mapping those actors' names to the actors.
-  this._tabActorPool = new ActorPool(aConnection);
+  this._tabActorPool = new ActorPool(connection);
 
   for (let global of gTestGlobals) {
-    let actor = new TestTabActor(aConnection, global);
+    let actor = new TestTabActor(connection, global);
     actor.selected = false;
     this._tabActors.push(actor);
     this._tabActorPool.addActor(actor);
   }
   if (this._tabActors.length > 0) {
     this._tabActors[0].selected = true;
   }
 
-  aConnection.addActorPool(this._tabActorPool);
+  connection.addActorPool(this._tabActorPool);
 }
 
 TestTabList.prototype = {
   constructor: TestTabList,
   getList: function () {
     return promise.resolve([...this._tabActors]);
   }
 };
 
-function createRootActor(aConnection) {
-  let root = new RootActor(aConnection, {
-    tabList: new TestTabList(aConnection),
+function createRootActor(connection) {
+  let root = new RootActor(connection, {
+    tabList: new TestTabList(connection),
     globalActorFactories: DebuggerServer.globalActorFactories
   });
   root.applicationType = "xpcshell-tests";
   return root;
 }
 
-function TestTabActor(aConnection, aGlobal) {
-  this.conn = aConnection;
-  this._global = aGlobal;
+function TestTabActor(connection, global) {
+  this.conn = connection;
+  this._global = global;
   this._threadActor = new ThreadActor(this, this._global);
   this.conn.addActor(this._threadActor);
   this._attached = false;
   this._extraActors = {};
 }
 
 TestTabActor.prototype = {
   constructor: TestTabActor,
@@ -91,28 +92,28 @@ TestTabActor.prototype = {
       this.conn.addActorPool(this._tabActorPool);
     }
 
     this._appendExtraActors(response);
 
     return response;
   },
 
-  onAttach: function (aRequest) {
+  onAttach: function (request) {
     this._attached = true;
 
     let response = { type: "tabAttached", threadActor: this._threadActor.actorID };
     this._appendExtraActors(response);
 
     return response;
   },
 
-  onDetach: function (aRequest) {
+  onDetach: function (request) {
     if (!this._attached) {
-      return { "error":"wrongState" };
+      return { "error": "wrongState" };
     }
     return { type: "detached" };
   },
 
   /* Support for DebuggerServer.addTabActor. */
   _createExtraActors: createExtraActors,
   _appendExtraActors: appendExtraActors
 };

--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -7567,17 +7567,23 @@ nsDocShell::EndPageLoad(nsIWebProgress* 
                         nsIChannel* aChannel, nsresult aStatus)
 {
   if (!aChannel) {
     return NS_ERROR_NULL_POINTER;
   }
 
   nsCOMPtr<nsIConsoleReportCollector> reporter = do_QueryInterface(aChannel);
   if (reporter) {
-    reporter->FlushConsoleReports(GetDocument());
+    nsCOMPtr<nsILoadGroup> loadGroup;
+    aChannel->GetLoadGroup(getter_AddRefs(loadGroup));
+    if (loadGroup) {
+      reporter->FlushConsoleReports(loadGroup);
+    } else {
+      reporter->FlushConsoleReports(GetDocument());
+    }
   }
 
   nsCOMPtr<nsIURI> url;
   nsresult rv = aChannel->GetURI(getter_AddRefs(url));
   if (NS_FAILED(rv)) {
     return rv;
   }
 

--- a/dom/base/TimeoutManager.cpp
+++ b/dom/base/TimeoutManager.cpp
@@ -928,28 +928,38 @@ TimeoutManager::Timeouts::ResetTimersFor
 
       // Since we reset When() we need to move |timeout| to the right
       // place in the list so that it remains sorted by When().
 
       // Get the pointer to the next timeout now, before we move the
       // current timeout in the list.
       Timeout* nextTimeout = timeout->getNext();
 
-      // It is safe to remove and re-insert because When() is now
-      // strictly smaller than it used to be, so we know we'll insert
-      // |timeout| before nextTimeout.
-      NS_ASSERTION(!nextTimeout ||
-                   timeout->When() < nextTimeout->When(), "How did that happen?");
-      timeout->remove();
-      // Insert() will addref |timeout| and reset mFiringDepth.  Make sure to
-      // undo that after calling it.
-      uint32_t firingDepth = timeout->mFiringDepth;
-      Insert(timeout, aSortBy);
-      timeout->mFiringDepth = firingDepth;
-      timeout->Release();
+      // Since we are only reducing intervals in this method we can
+      // make an optimization here.  If the reduction does not cause us
+      // to fall before our previous timeout then we do not have to
+      // remove and re-insert the current timeout.  This is important
+      // because re-insertion makes this algorithm O(n^2).  Since we
+      // will typically be shifting a lot of timers at once this
+      // optimization saves us a lot of work.
+      Timeout* prevTimeout = timeout->getPrevious();
+      if (prevTimeout && prevTimeout->When() > timeout->When()) {
+        // It is safe to remove and re-insert because When() is now
+        // strictly smaller than it used to be, so we know we'll insert
+        // |timeout| before nextTimeout.
+        NS_ASSERTION(!nextTimeout ||
+                     timeout->When() < nextTimeout->When(), "How did that happen?");
+        timeout->remove();
+        // Insert() will addref |timeout| and reset mFiringDepth.  Make sure to
+        // undo that after calling it.
+        uint32_t firingDepth = timeout->mFiringDepth;
+        Insert(timeout, aSortBy);
+        timeout->mFiringDepth = firingDepth;
+        timeout->Release();
+      }
 
       nsresult rv = timeout->InitTimer(aQueue, delay.ToMilliseconds());
 
       if (NS_FAILED(rv)) {
         NS_WARNING("Error resetting non background timer for DOM timeout!");
         return rv;
       }
 

--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -1792,18 +1792,17 @@ nsContentUtils::ParseLegacyFontSize(cons
 
   return clamped(value, 1, 7);
 }
 
 /* static */
 bool
 nsContentUtils::IsControlledByServiceWorker(nsIDocument* aDocument)
 {
-  if (aDocument &&
-      aDocument->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId) {
+  if (nsContentUtils::IsInPrivateBrowsing(aDocument)) {
     return false;
   }
 
   RefPtr<workers::ServiceWorkerManager> swm =
     workers::ServiceWorkerManager::GetInstance();
   MOZ_ASSERT(swm);
 
   ErrorResult rv;
@@ -3201,16 +3200,50 @@ nsContentUtils::GetOriginAttributes(nsIL
     nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
     if (loadContext && loadContext->GetOriginAttributes(attrs)) {
       attrs.StripAttributes(OriginAttributes::STRIP_ADDON_ID);
     }
   }
   return attrs;
 }
 
+// static
+bool
+nsContentUtils::IsInPrivateBrowsing(nsIDocument* aDoc)
+{
+  if (!aDoc) {
+    return false;
+  }
+
+  nsCOMPtr<nsILoadGroup> loadGroup = aDoc->GetDocumentLoadGroup();
+  if (loadGroup) {
+    return IsInPrivateBrowsing(loadGroup);
+  }
+
+  nsCOMPtr<nsIChannel> channel = aDoc->GetChannel();
+  return channel && NS_UsePrivateBrowsing(channel);
+}
+
+// static
+bool
+nsContentUtils::IsInPrivateBrowsing(nsILoadGroup* aLoadGroup)
+{
+  if (!aLoadGroup) {
+    return false;
+  }
+  bool isPrivate = false;
+  nsCOMPtr<nsIInterfaceRequestor> callbacks;
+  aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
+  if (callbacks) {
+    nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
+    isPrivate = loadContext && loadContext->UsePrivateBrowsing();
+  }
+  return isPrivate;
+}
+
 bool
 nsContentUtils::DocumentInactiveForImageLoads(nsIDocument* aDocument)
 {
   if (aDocument && !IsChromeDoc(aDocument) && !aDocument->IsResourceDoc()) {
     nsCOMPtr<nsPIDOMWindowInner> win =
       do_QueryInterface(aDocument->GetScopeObject());
     return !win || !win->GetDocShell();
   }
@@ -3220,36 +3253,19 @@ nsContentUtils::DocumentInactiveForImage
 imgLoader*
 nsContentUtils::GetImgLoaderForDocument(nsIDocument* aDoc)
 {
   NS_ENSURE_TRUE(!DocumentInactiveForImageLoads(aDoc), nullptr);
 
   if (!aDoc) {
     return imgLoader::NormalLoader();
   }
-
-  nsCOMPtr<nsILoadGroup> loadGroup = aDoc->GetDocumentLoadGroup();
-  if (loadGroup) {
-    nsCOMPtr<nsIInterfaceRequestor> callbacks;
-    loadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
-    if (callbacks) {
-      nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
-      if (loadContext && loadContext->UsePrivateBrowsing()) {
-        return imgLoader::PrivateBrowsingLoader();
-      }
-    }
-    return imgLoader::NormalLoader();
-  }
-
-  nsCOMPtr<nsIChannel> channel = aDoc->GetChannel();
-  if (channel && NS_UsePrivateBrowsing(channel)) {
-    return imgLoader::PrivateBrowsingLoader();
-  }
-
-  return imgLoader::NormalLoader();
+  bool isPrivate = IsInPrivateBrowsing(aDoc);
+  return isPrivate ? imgLoader::PrivateBrowsingLoader()
+                   : imgLoader::NormalLoader();
 }
 
 // static
 imgLoader*
 nsContentUtils::GetImgLoaderForChannel(nsIChannel* aChannel,
                                        nsIDocument* aContext)
 {
   NS_ENSURE_TRUE(!DocumentInactiveForImageLoads(aContext), nullptr);
@@ -3671,16 +3687,32 @@ nsContentUtils::ReportToConsoleNonLocali
   uint64_t innerWindowID = 0;
   if (aDocument) {
     if (!aURI) {
       aURI = aDocument->GetDocumentURI();
     }
     innerWindowID = aDocument->InnerWindowID();
   }
 
+  return ReportToConsoleByWindowID(aErrorText, aErrorFlags, aCategory,
+                                   innerWindowID, aURI, aSourceLine,
+                                   aLineNumber, aColumnNumber, aLocationMode);
+}
+
+/* static */ nsresult
+nsContentUtils::ReportToConsoleByWindowID(const nsAString& aErrorText,
+                                          uint32_t aErrorFlags,
+                                          const nsACString& aCategory,
+                                          uint64_t aInnerWindowID,
+                                          nsIURI* aURI,
+                                          const nsAFlatString& aSourceLine,
+                                          uint32_t aLineNumber,
+                                          uint32_t aColumnNumber,
+                                          MissingErrorLocationMode aLocationMode)
+{
   nsresult rv;
   if (!sConsoleService) { // only need to bother null-checking here
     rv = CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
     NS_ENSURE_SUCCESS(rv, rv);
   }
 
   nsAutoCString spec;
   if (!aLineNumber && aLocationMode == eUSE_CALLING_LOCATION) {
@@ -3697,17 +3729,17 @@ nsContentUtils::ReportToConsoleNonLocali
       do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
 
   rv = errorObject->InitWithWindowID(aErrorText,
                                      NS_ConvertUTF8toUTF16(spec), // file name
                                      aSourceLine,
                                      aLineNumber, aColumnNumber,
                                      aErrorFlags, aCategory,
-                                     innerWindowID);
+                                     aInnerWindowID);
   NS_ENSURE_SUCCESS(rv, rv);
 
   return sConsoleService->LogMessage(errorObject);
 }
 
 void
 nsContentUtils::LogMessageToConsole(const char* aMsg)
 {
@@ -7336,18 +7368,28 @@ nsContentUtils::GetInnerWindowID(nsIRequ
 
   nsCOMPtr<nsILoadGroup> loadGroup;
   nsresult rv = aRequest->GetLoadGroup(getter_AddRefs(loadGroup));
 
   if (NS_FAILED(rv) || !loadGroup) {
     return 0;
   }
 
+  return GetInnerWindowID(loadGroup);
+}
+
+uint64_t
+nsContentUtils::GetInnerWindowID(nsILoadGroup* aLoadGroup)
+{
+  if (!aLoadGroup) {
+    return 0;
+  }
+
   nsCOMPtr<nsIInterfaceRequestor> callbacks;
-  rv = loadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
+  nsresult rv = aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
   if (NS_FAILED(rv) || !callbacks) {
     return 0;
   }
 
   nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
   if (!loadContext) {
     return 0;
   }
@@ -8620,17 +8662,17 @@ nsContentUtils::InternalStorageAllowedFo
   if (aWindow) {
     // If the document is sandboxed, then it is not permitted to use storage
     nsIDocument* document = aWindow->GetExtantDoc();
     if (document->GetSandboxFlags() & SANDBOXED_ORIGIN) {
       return StorageAccess::eDeny;
     }
 
     // Check if we are in private browsing, and record that fact
-    if (document->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId) {
+    if (IsInPrivateBrowsing(document)) {
       access = StorageAccess::ePrivateBrowsing;
     }
   }
 
   nsCOMPtr<nsIPermissionManager> permissionManager =
     services::GetPermissionManager();
   if (!permissionManager) {
     return StorageAccess::eDeny;

--- a/dom/base/nsContentUtils.h
+++ b/dom/base/nsContentUtils.h
@@ -817,16 +817,26 @@ public:
 
   /**
    * Returns origin attributes of the load group.
    **/
   static mozilla::OriginAttributes
   GetOriginAttributes(nsILoadGroup* aLoadGroup);
 
   /**
+   * Returns true if this document is in a Private Browsing window.
+   */
+  static bool IsInPrivateBrowsing(nsIDocument* aDoc);
+
+  /**
+   * Returns true if this loadGroup uses Private Browsing.
+   */
+  static bool IsInPrivateBrowsing(nsILoadGroup* aLoadGroup);
+
+  /**
    * If aNode is not an element, return true exactly when aContent's binding
    * parent is null.
    *
    * If aNode is an element, return true exactly when aContent's binding parent
    * is the same as aNode's.
    *
    * This method is particularly useful for callers who are trying to ensure
    * that they are working with a non-anonymous descendant of a given node.  If
@@ -884,16 +894,47 @@ public:
                                               const nsAFlatString& aSourceLine
                                                 = EmptyString(),
                                               uint32_t aLineNumber = 0,
                                               uint32_t aColumnNumber = 0,
                                               MissingErrorLocationMode aLocationMode
                                                 = eUSE_CALLING_LOCATION);
 
   /**
+   * Report a non-localized error message to the error console base on the
+   * innerWindowID.
+   *   @param aErrorText the error message
+   *   @param aErrorFlags See nsIScriptError.
+   *   @param aCategory Name of module reporting error.
+   *   @param [aInnerWindowID] Inner window ID for document which triggered the
+   *          message.
+   *   @param [aURI=nullptr] (Optional) URI of resource containing error.
+   *   @param [aSourceLine=EmptyString()] (Optional) The text of the line that
+              contains the error (may be empty).
+   *   @param [aLineNumber=0] (Optional) Line number within resource
+              containing error.
+   *   @param [aColumnNumber=0] (Optional) Column number within resource
+              containing error.
+              If aURI is null, then aDocument->GetDocumentURI() is used.
+   *   @param [aLocationMode] (Optional) Specifies the behavior if
+              error location information is omitted.
+   */
+  static nsresult ReportToConsoleByWindowID(const nsAString& aErrorText,
+                                            uint32_t aErrorFlags,
+                                            const nsACString& aCategory,
+                                            uint64_t aInnerWindowID,
+                                            nsIURI* aURI = nullptr,
+                                            const nsAFlatString& aSourceLine
+                                              = EmptyString(),
+                                            uint32_t aLineNumber = 0,
+                                            uint32_t aColumnNumber = 0,
+                                            MissingErrorLocationMode aLocationMode
+                                              = eUSE_CALLING_LOCATION);
+
+  /**
    * Report a localized error message to the error console.
    *   @param aErrorFlags See nsIScriptError.
    *   @param aCategory Name of module reporting error.
    *   @param aDocument Reference to the document which triggered the message.
    *   @param aFile Properties file containing localized message.
    *   @param aMessageName Name of localized message.
    *   @param [aParams=nullptr] (Optional) Parameters to be substituted into
               localized message.
@@ -2446,21 +2487,26 @@ public:
 
   /**
    * Returns whether a given header is forbidden for an XHR or fetch
    * response.
    */
   static bool IsForbiddenResponseHeader(const nsACString& aHeader);
 
   /**
-   * Returns the inner window ID for the window associated with a request,
+   * Returns the inner window ID for the window associated with a request.
    */
   static uint64_t GetInnerWindowID(nsIRequest* aRequest);
 
   /**
+   * Returns the inner window ID for the window associated with a load group.
+   */
+  static uint64_t GetInnerWindowID(nsILoadGroup* aLoadGroup);
+
+  /**
    * If the hostname for aURI is an IPv6 it encloses it in brackets,
    * otherwise it just outputs the hostname in aHost.
    */
   static nsresult GetHostOrIPv6WithBrackets(nsIURI* aURI, nsAString& aHost);
   static nsresult GetHostOrIPv6WithBrackets(nsIURI* aURI, nsCString& aHost);
 
   /*
    * Call the given callback on all remote children of the given top-level

--- a/dom/base/nsScriptLoader.cpp
+++ b/dom/base/nsScriptLoader.cpp
@@ -2483,17 +2483,22 @@ nsScriptLoader::OnStreamComplete(nsIIncr
     MOZ_ASSERT(mReporter);
 
     nsAutoCString sourceUri;
     if (mDocument && mDocument->GetDocumentURI()) {
       mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
     }
     rv = aSRIDataVerifier->Verify(aRequest->mIntegrity, channel, sourceUri,
                                   mReporter);
-    mReporter->FlushConsoleReports(mDocument);
+    if (channelRequest) {
+      mReporter->FlushReportsToConsole(
+        nsContentUtils::GetInnerWindowID(channelRequest));
+    } else {
+      mReporter->FlushConsoleReports(mDocument);
+    }
     if (NS_FAILED(rv)) {
       rv = NS_ERROR_SRI_CORRUPT;
     }
   } else {
     nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
 
     if (loadInfo->GetEnforceSRI()) {
       MOZ_LOG(SRILogHelper::GetSriLog(), mozilla::LogLevel::Debug,

--- a/dom/console/ConsoleReportCollector.cpp
+++ b/dom/console/ConsoleReportCollector.cpp
@@ -34,64 +34,85 @@ ConsoleReportCollector::AddConsoleReport
 
   mPendingReports.AppendElement(PendingReport(aErrorFlags, aCategory,
                                               aPropertiesFile, aSourceFileURI,
                                               aLineNumber, aColumnNumber,
                                               aMessageName, aStringParams));
 }
 
 void
-ConsoleReportCollector::FlushConsoleReports(nsIDocument* aDocument,
-                                            ReportAction aAction)
+ConsoleReportCollector::FlushReportsToConsole(uint64_t aInnerWindowID,
+                                              ReportAction aAction)
 {
-  MOZ_ASSERT(NS_IsMainThread());
-
   nsTArray<PendingReport> reports;
 
   {
     MutexAutoLock lock(mMutex);
     if (aAction == ReportAction::Forget) {
       mPendingReports.SwapElements(reports);
     } else {
       reports = mPendingReports;
     }
   }
 
   for (uint32_t i = 0; i < reports.Length(); ++i) {
     PendingReport& report = reports[i];
 
+    nsXPIDLString errorText;
+    nsresult rv;
+    if (!report.mStringParams.IsEmpty()) {
+      rv = nsContentUtils::FormatLocalizedString(report.mPropertiesFile,
+                                                 report.mMessageName.get(),
+                                                 report.mStringParams,
+                                                 errorText);
+    } else {
+      rv = nsContentUtils::GetLocalizedString(report.mPropertiesFile,
+                                              report.mMessageName.get(),
+                                              errorText);
+    }
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      continue;
+    }
+
     // It would be nice if we did not have to do this since ReportToConsole()
     // just turns around and converts it back to a spec.
     nsCOMPtr<nsIURI> uri;
     if (!report.mSourceFileURI.IsEmpty()) {
       nsresult rv = NS_NewURI(getter_AddRefs(uri), report.mSourceFileURI);
       MOZ_ALWAYS_SUCCEEDS(rv);
       if (NS_FAILED(rv)) {
         continue;
       }
     }
 
-    // Convert back from nsTArray<nsString> to the char16_t** format required
-    // by our l10n libraries and ReportToConsole. (bug 1219762)
-    UniquePtr<const char16_t*[]> params;
-    uint32_t paramsLength = report.mStringParams.Length();
-    if (paramsLength > 0) {
-      params = MakeUnique<const char16_t*[]>(paramsLength);
-      for (uint32_t j = 0; j < paramsLength; ++j) {
-        params[j] = report.mStringParams[j].get();
-      }
-    }
+    nsContentUtils::ReportToConsoleByWindowID(errorText,
+                                              report.mErrorFlags,
+                                              report.mCategory,
+                                              aInnerWindowID,
+                                              uri,
+                                              EmptyString(),
+                                              report.mLineNumber,
+                                              report.mColumnNumber);
+  }
+}
 
-    nsContentUtils::ReportToConsole(report.mErrorFlags, report.mCategory,
-                                    aDocument, report.mPropertiesFile,
-                                    report.mMessageName.get(),
-                                    params.get(),
-                                    paramsLength, uri, EmptyString(),
-                                    report.mLineNumber, report.mColumnNumber);
-  }
+void
+ConsoleReportCollector::FlushConsoleReports(nsIDocument* aDocument,
+                                            ReportAction aAction)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  FlushReportsToConsole(aDocument ? aDocument->InnerWindowID() : 0, aAction);
+}
+
+void
+ConsoleReportCollector::FlushConsoleReports(nsILoadGroup* aLoadGroup,
+                                            ReportAction aAction)
+{
+  FlushReportsToConsole(nsContentUtils::GetInnerWindowID(aLoadGroup), aAction);
 }
 
 void
 ConsoleReportCollector::FlushConsoleReports(nsIConsoleReportCollector* aCollector)
 {
   MOZ_ASSERT(aCollector);
 
   nsTArray<PendingReport> reports;
@@ -106,81 +127,16 @@ ConsoleReportCollector::FlushConsoleRepo
     aCollector->AddConsoleReport(report.mErrorFlags, report.mCategory,
                                  report.mPropertiesFile, report.mSourceFileURI,
                                  report.mLineNumber, report.mColumnNumber,
                                  report.mMessageName, report.mStringParams);
   }
 }
 
 void
-ConsoleReportCollector::FlushReportsByWindowId(uint64_t aWindowId,
-                                               ReportAction aAction)
-{
-  MOZ_ASSERT(NS_IsMainThread());
-
-  nsTArray<PendingReport> reports;
-
-  {
-    MutexAutoLock lock(mMutex);
-    if (aAction == ReportAction::Forget) {
-      mPendingReports.SwapElements(reports);
-    } else {
-      reports = mPendingReports;
-    }
-  }
-
-  nsCOMPtr<nsIConsoleService> consoleService =
-    do_GetService(NS_CONSOLESERVICE_CONTRACTID);
-  if (!consoleService) {
-    NS_WARNING("GetConsoleService failed");
-    return;
-  }
-
-  nsresult rv;
-  for (uint32_t i = 0; i < reports.Length(); ++i) {
-    PendingReport& report = reports[i];
-
-    nsXPIDLString errorText;
-    if (!report.mStringParams.IsEmpty()) {
-      rv = nsContentUtils::FormatLocalizedString(report.mPropertiesFile,
-                                                 report.mMessageName.get(),
-                                                 report.mStringParams,
-                                                 errorText);
-    } else {
-      rv = nsContentUtils::GetLocalizedString(report.mPropertiesFile,
-                                              report.mMessageName.get(),
-                                              errorText);
-    }
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      continue;
-    }
-
-    nsCOMPtr<nsIScriptError> errorObject =
-    do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv);
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      continue;
-    }
-
-    rv = errorObject->InitWithWindowID(errorText,
-                                       NS_ConvertUTF8toUTF16(report.mSourceFileURI),
-                                       EmptyString(),
-                                       report.mLineNumber,
-                                       report.mColumnNumber,
-                                       report.mErrorFlags,
-                                       report.mCategory,
-                                       aWindowId);
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      continue;
-    }
-
-    consoleService->LogMessage(errorObject);
-  }
-}
-
-void
 ConsoleReportCollector::ClearConsoleReports()
 {
   MutexAutoLock lock(mMutex);
 
   mPendingReports.Clear();
 }
 
 ConsoleReportCollector::~ConsoleReportCollector()

--- a/dom/console/ConsoleReportCollector.h
+++ b/dom/console/ConsoleReportCollector.h
@@ -22,27 +22,31 @@ public:
   AddConsoleReport(uint32_t aErrorFlags, const nsACString& aCategory,
                    nsContentUtils::PropertiesFile aPropertiesFile,
                    const nsACString& aSourceFileURI,
                    uint32_t aLineNumber, uint32_t aColumnNumber,
                    const nsACString& aMessageName,
                    const nsTArray<nsString>& aStringParams) override;
 
   void
+  FlushReportsToConsole(uint64_t aInnerWindowID,
+                        ReportAction aAction = ReportAction::Forget) override;
+
+  void
   FlushConsoleReports(nsIDocument* aDocument,
                       ReportAction aAction = ReportAction::Forget) override;
 
   void
+  FlushConsoleReports(nsILoadGroup* aLoadGroup,
+                      ReportAction aAction = ReportAction::Forget) override;
+
+  void
   FlushConsoleReports(nsIConsoleReportCollector* aCollector) override;
 
   void
-  FlushReportsByWindowId(uint64_t aWindowId,
-                         ReportAction aAction = ReportAction::Forget) override;
-
-  void
   ClearConsoleReports() override;
 
 private:
   ~ConsoleReportCollector();
 
   struct PendingReport
   {
     PendingReport(uint32_t aErrorFlags, const nsACString& aCategory,

--- a/dom/console/nsIConsoleReportCollector.h
+++ b/dom/console/nsIConsoleReportCollector.h
@@ -69,47 +69,58 @@ public:
   // An enum calss to indicate whether should free the pending reports or not.
   // Forget        Free the pending reports.
   // Save          Keep the pending reports.
   enum class ReportAction {
     Forget,
     Save
   };
 
+  // Flush all pending reports to the console.  May be called from any thread.
+  //
+  // aInnerWindowID A inner window ID representing where to flush the reports.
+  // aAction        An action to determine whether to reserve the pending
+  //                reports. Defalut action is to forget the report.
+  virtual void
+  FlushReportsToConsole(uint64_t aInnerWindowID,
+                        ReportAction aAction = ReportAction::Forget) = 0;
+
   // Flush all pending reports to the console.  Main thread only.
   //
   // aDocument      An optional document representing where to flush the
   //                reports.  If provided, then the corresponding window's
   //                web console will get the reports.  Otherwise the reports
   //                go to the browser console.
   // aAction        An action to determine whether to reserve the pending
   //                reports. Defalut action is to forget the report.
   virtual void
   FlushConsoleReports(nsIDocument* aDocument,
                       ReportAction aAction = ReportAction::Forget) = 0;
 
+  // Flush all pending reports to the console.  May be called from any thread.
+  //
+  // aLoadGroup     An optional loadGroup representing where to flush the
+  //                reports.  If provided, then the corresponding window's
+  //                web console will get the reports.  Otherwise the reports
+  //                go to the browser console.
+  // aAction        An action to determine whether to reserve the pending
+  //                reports. Defalut action is to forget the report.
+  virtual void
+  FlushConsoleReports(nsILoadGroup* aLoadGroup,
+                      ReportAction aAction = ReportAction::Forget) = 0;
+
+
   // Flush all pending reports to another collector.  May be called from any
   // thread.
   //
   // aCollector     A required collector object that will effectively take
   //                ownership of our currently console reports.
   virtual void
   FlushConsoleReports(nsIConsoleReportCollector* aCollector) = 0;
 
-  // Flush all pending reports to the console accroding to window ID. Main
-  // thread only.
-  //
-  // aWindowId      A window ID representing where to flush the reports and it's
-  //                typically the inner window ID.
-  //
-  // aAction        An action to decide whether free the pending reports or not.
-  virtual void
-  FlushReportsByWindowId(uint64_t aWindowId,
-                         ReportAction aAction = ReportAction::Forget) = 0;
-
   // Clear all pending reports.
   virtual void
   ClearConsoleReports() = 0;
 };
 
 NS_DEFINE_STATIC_IID_ACCESSOR(nsIConsoleReportCollector, NS_NSICONSOLEREPORTCOLLECTOR_IID)
 
 #endif // nsIConsoleReportCollector_h

--- a/dom/fetch/Fetch.cpp
+++ b/dom/fetch/Fetch.cpp
@@ -95,41 +95,41 @@ private:
   FlushConsoleReport() override;
 };
 
 class MainThreadFetchResolver final : public FetchDriverObserver
 {
   RefPtr<Promise> mPromise;
   RefPtr<Response> mResponse;
 
-  nsCOMPtr<nsIDocument> mDocument;
+  nsCOMPtr<nsILoadGroup> mLoadGroup;
 
   NS_DECL_OWNINGTHREAD
 public:
   explicit MainThreadFetchResolver(Promise* aPromise);
 
   void
   OnResponseAvailableInternal(InternalResponse* aResponse) override;
 
-  void SetDocument(nsIDocument* aDocument)
+  void SetLoadGroup(nsILoadGroup* aLoadGroup)
   {
-    mDocument = aDocument;
+    mLoadGroup = aLoadGroup;
   }
 
   virtual void OnResponseEnd() override
   {
     FlushConsoleReport();
   }
 
 private:
   ~MainThreadFetchResolver();
 
   void FlushConsoleReport() override
   {
-    mReporter->FlushConsoleReports(mDocument);
+    mReporter->FlushConsoleReports(mLoadGroup);
   }
 };
 
 class MainThreadFetchRunnable : public Runnable
 {
   RefPtr<WorkerFetchResolver> mResolver;
   RefPtr<InternalRequest> mRequest;
 
@@ -233,17 +233,17 @@ FetchRequest(nsIGlobalObject* aGlobal, c
       }
     }
 
     Telemetry::Accumulate(Telemetry::FETCH_IS_MAINTHREAD, 1);
 
     RefPtr<MainThreadFetchResolver> resolver = new MainThreadFetchResolver(p);
     RefPtr<FetchDriver> fetch = new FetchDriver(r, principal, loadGroup);
     fetch->SetDocument(doc);
-    resolver->SetDocument(doc);
+    resolver->SetLoadGroup(loadGroup);
     aRv = fetch->Fetch(resolver);
     if (NS_WARN_IF(aRv.Failed())) {
       return nullptr;
     }
   } else {
     WorkerPrivate* worker = GetCurrentThreadWorkerPrivate();
     MOZ_ASSERT(worker);
 
@@ -448,40 +448,40 @@ WorkerFetchResolver::FlushConsoleReport(
   MOZ_ASSERT(mPromiseProxy);
 
   if(!mReporter) {
     return;
   }
 
   workers::WorkerPrivate* worker = mPromiseProxy->GetWorkerPrivate();
   if (!worker) {
-    mReporter->FlushConsoleReports((nsIDocument*)nullptr);
+    mReporter->FlushReportsToConsole(0);
     return;
   }
 
   if (worker->IsServiceWorker()) {
     // Flush to service worker
     RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
     if (!swm) {
-      mReporter->FlushConsoleReports((nsIDocument*)nullptr);
+      mReporter->FlushReportsToConsole(0);
       return;
     }
 
     swm->FlushReportsToAllClients(worker->WorkerName(), mReporter);
     return;
   }
 
   if (worker->IsSharedWorker()) {
     // Flush to shared worker
     worker->FlushReportsToSharedWorkers(mReporter);
     return;
   }
 
   // Flush to dedicated worker
-  mReporter->FlushConsoleReports(worker->GetDocument());
+  mReporter->FlushConsoleReports(worker->GetLoadGroup());
 }
 
 nsresult
 ExtractByteStreamFromBody(const OwningArrayBufferOrArrayBufferViewOrBlobOrFormDataOrUSVStringOrURLSearchParams& aBodyInit,
                           nsIInputStream** aStream,
                           nsCString& aContentTypeWithCharset,
                           uint64_t& aContentLength)
 {

--- a/dom/file/File.cpp
+++ b/dom/file/File.cpp
@@ -31,16 +31,17 @@
 #include "nsPrintfCString.h"
 #include "mozilla/SHA1.h"
 #include "mozilla/CheckedInt.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/Attributes.h"
 #include "mozilla/dom/BlobBinding.h"
 #include "mozilla/dom/DOMError.h"
 #include "mozilla/dom/FileBinding.h"
+#include "mozilla/dom/FileSystemUtils.h"
 #include "mozilla/dom/WorkerPrivate.h"
 #include "mozilla/dom/WorkerRunnable.h"
 #include "nsThreadUtils.h"
 #include "nsStreamUtils.h"
 #include "SlicedInputStream.h"
 
 namespace mozilla {
 namespace dom {
@@ -465,25 +466,28 @@ File::WrapObject(JSContext* aCx, JS::Han
 
 void
 File::GetName(nsAString& aFileName) const
 {
   mImpl->GetName(aFileName);
 }
 
 void
-File::GetPath(nsAString& aPath) const
+File::GetRelativePath(nsAString& aPath) const
 {
-  mImpl->GetPath(aPath);
-}
+  aPath.Truncate();
 
-void
-File::SetPath(const nsAString& aPath)
-{
-  mImpl->SetPath(aPath);
+  nsAutoString path;
+  mImpl->GetDOMPath(path);
+
+  // WebkitRelativePath doesn't start with '/'
+  if (!path.IsEmpty()) {
+    MOZ_ASSERT(path[0] == FILESYSTEM_DOM_PATH_SEPARATOR_CHAR);
+    aPath.Assign(Substring(path, 1));
+  }
 }
 
 Date
 File::GetLastModifiedDate(ErrorResult& aRv)
 {
   int64_t value = GetLastModified(aRv);
   if (aRv.Failed()) {
     return Date();
@@ -665,24 +669,24 @@ NS_IMPL_ISUPPORTS_INHERITED0(BlobImplFil
 void
 BlobImplBase::GetName(nsAString& aName) const
 {
   MOZ_ASSERT(mIsFile, "Should only be called on files");
   aName = mName;
 }
 
 void
-BlobImplBase::GetPath(nsAString& aPath) const
+BlobImplBase::GetDOMPath(nsAString& aPath) const
 {
   MOZ_ASSERT(mIsFile, "Should only be called on files");
   aPath = mPath;
 }
 
 void
-BlobImplBase::SetPath(const nsAString& aPath)
+BlobImplBase::SetDOMPath(const nsAString& aPath)
 {
   MOZ_ASSERT(mIsFile, "Should only be called on files");
   mPath = aPath;
 }
 
 void
 BlobImplBase::GetMozFullPath(nsAString& aFileName,
                              SystemCallerGuarantee /* unused */,

--- a/dom/file/File.h
+++ b/dom/file/File.h
@@ -220,23 +220,17 @@ public:
                     ErrorResult& aRv);
 
   void GetName(nsAString& aName) const;
 
   int64_t GetLastModified(ErrorResult& aRv);
 
   Date GetLastModifiedDate(ErrorResult& aRv);
 
-  // GetPath and SetPath are currently used only for the webkitRelativePath
-  // attribute and they are only used when this File object is created from a
-  // Directory, generated by a Directory Picker.
-
-  void GetPath(nsAString& aName) const;
-
-  void SetPath(const nsAString& aName);
+  void GetRelativePath(nsAString& aPath) const;
 
   void GetMozFullPath(nsAString& aFilename, SystemCallerGuarantee aGuarantee,
                       ErrorResult& aRv) const;
 
   void GetMozFullPathInternal(nsAString& aName, ErrorResult& aRv) const;
 
 protected:
   virtual bool HasFileInterface() const override { return true; }
@@ -255,19 +249,19 @@ class BlobImpl : public nsISupports
 public:
   NS_DECLARE_STATIC_IID_ACCESSOR(BLOBIMPL_IID)
   NS_DECL_THREADSAFE_ISUPPORTS
 
   BlobImpl() {}
 
   virtual void GetName(nsAString& aName) const = 0;
 
-  virtual void GetPath(nsAString& aName) const = 0;
+  virtual void GetDOMPath(nsAString& aName) const = 0;
 
-  virtual void SetPath(const nsAString& aName) = 0;
+  virtual void SetDOMPath(const nsAString& aName) = 0;
 
   virtual int64_t GetLastModified(ErrorResult& aRv) = 0;
 
   virtual void SetLastModified(int64_t aLastModified) = 0;
 
   virtual void GetMozFullPath(nsAString& aName,
                               SystemCallerGuarantee /* unused */,
                               ErrorResult& aRv) const = 0;
@@ -401,19 +395,19 @@ public:
   {
     MOZ_ASSERT(aLength != UINT64_MAX, "Must know length when creating slice");
     // Ensure non-null mContentType by default
     mContentType.SetIsVoid(false);
   }
 
   virtual void GetName(nsAString& aName) const override;
 
-  virtual void GetPath(nsAString& aName) const override;
+  virtual void GetDOMPath(nsAString& aName) const override;
 
-  virtual void SetPath(const nsAString& aName) override;
+  virtual void SetDOMPath(const nsAString& aName) override;
 
   virtual int64_t GetLastModified(ErrorResult& aRv) override;
 
   virtual void SetLastModified(int64_t aLastModified) override;
 
   virtual void GetMozFullPath(nsAString& aName,
                               SystemCallerGuarantee /* unused */,
                               ErrorResult& aRv) const override;

--- a/dom/file/ipc/Blob.cpp
+++ b/dom/file/ipc/Blob.cpp
@@ -2066,20 +2066,20 @@ public:
   NoteDyingActor();
 
   NS_DECL_ISUPPORTS_INHERITED
 
   void
   GetName(nsAString& aName) const override;
 
   void
-  GetPath(nsAString& aPath) const override;
+  GetDOMPath(nsAString& aPath) const override;
 
   void
-  SetPath(const nsAString& aPath) override;
+  SetDOMPath(const nsAString& aPath) override;
 
   int64_t
   GetLastModified(ErrorResult& aRv) override;
 
   void
   SetLastModified(int64_t aLastModified) override;
 
   void
@@ -2170,27 +2170,27 @@ private:
  * BlobChild::RemoteBlobImpl
  ******************************************************************************/
 
 BlobChild::
 RemoteBlobImpl::RemoteBlobImpl(BlobChild* aActor,
                                BlobImpl* aRemoteBlobImpl,
                                const nsAString& aName,
                                const nsAString& aContentType,
-                               const nsAString& aPath,
+                               const nsAString& aDOMPath,
                                uint64_t aLength,
                                int64_t aModDate,
                                BlobImplIsDirectory aIsDirectory,
                                bool aIsSameProcessBlob)
   : BlobImplBase(aName, aContentType, aLength, aModDate)
   , mWorkerPrivate(nullptr)
   , mMutex("BlobChild::RemoteBlobImpl::mMutex")
   , mIsSlice(false), mIsDirectory(aIsDirectory == eDirectory)
 {
-  SetPath(aPath);
+  SetDOMPath(aDOMPath);
 
   if (aIsSameProcessBlob) {
     MOZ_ASSERT(aRemoteBlobImpl);
     mSameProcessBlobImpl = aRemoteBlobImpl;
     MOZ_ASSERT(gProcessType == GeckoProcessType_Default);
   } else {
     mDifferentProcessBlobImpl = aRemoteBlobImpl;
   }
@@ -2838,26 +2838,26 @@ void
 BlobParent::
 RemoteBlobImpl::GetName(nsAString& aName) const
 {
   mBlobImpl->GetName(aName);
 }
 
 void
 BlobParent::
-RemoteBlobImpl::GetPath(nsAString& aPath) const
+RemoteBlobImpl::GetDOMPath(nsAString& aPath) const
 {
-  mBlobImpl->GetPath(aPath);
+  mBlobImpl->GetDOMPath(aPath);
 }
 
 void
 BlobParent::
-RemoteBlobImpl::SetPath(const nsAString& aPath)
+RemoteBlobImpl::SetDOMPath(const nsAString& aPath)
 {
-  mBlobImpl->SetPath(aPath);
+  mBlobImpl->SetDOMPath(aPath);
 }
 
 int64_t
 BlobParent::
 RemoteBlobImpl::GetLastModified(ErrorResult& aRv)
 {
   return mBlobImpl->GetLastModified(aRv);
 }
@@ -3191,28 +3191,28 @@ BlobChild::CommonInit(BlobChild* aOther,
   uint64_t length = otherImpl->GetSize(rv);
   MOZ_ASSERT(!rv.Failed());
 
   RemoteBlobImpl* remoteBlob = nullptr;
   if (otherImpl->IsFile()) {
     nsAutoString name;
     otherImpl->GetName(name);
 
-    nsAutoString path;
-    otherImpl->GetPath(path);
+    nsAutoString domPath;
+    otherImpl->GetDOMPath(domPath);
 
     int64_t modDate = otherImpl->GetLastModified(rv);
     MOZ_ASSERT(!rv.Failed());
 
     RemoteBlobImpl::BlobImplIsDirectory directory = otherImpl->IsDirectory() ?
       RemoteBlobImpl::BlobImplIsDirectory::eDirectory :
       RemoteBlobImpl::BlobImplIsDirectory::eNotDirectory;
 
     remoteBlob =
-      new RemoteBlobImpl(this, otherImpl, name, contentType, path,
+      new RemoteBlobImpl(this, otherImpl, name, contentType, domPath,
                          length, modDate, directory,
                          false /* SameProcessBlobImpl */);
   } else {
     remoteBlob = new RemoteBlobImpl(this, otherImpl, contentType, length,
                                     false /* SameProcessBlobImpl */);
   }
 
   // This RemoteBlob must be kept alive untill RecvCreatedFromKnownBlob is
@@ -3286,33 +3286,33 @@ BlobChild::CommonInit(const ChildBlobCon
 
       nsString contentType;
       blobImpl->GetType(contentType);
 
       if (blobImpl->IsFile()) {
         nsAutoString name;
         blobImpl->GetName(name);
 
-        nsAutoString path;
-        blobImpl->GetPath(path);
+        nsAutoString domPath;
+        blobImpl->GetDOMPath(domPath);
 
         int64_t lastModifiedDate = blobImpl->GetLastModified(rv);
         MOZ_ASSERT(!rv.Failed());
 
         RemoteBlobImpl::BlobImplIsDirectory directory =
           blobImpl->IsDirectory() ?
             RemoteBlobImpl::BlobImplIsDirectory::eDirectory :
             RemoteBlobImpl::BlobImplIsDirectory::eNotDirectory;
 
         remoteBlob =
           new RemoteBlobImpl(this,
                              blobImpl,
                              name,
                              contentType,
-                             path,
+                             domPath,
                              size,
                              lastModifiedDate,
                              directory,
                              true /* SameProcessBlobImpl */);
       } else {
         remoteBlob = new RemoteBlobImpl(this, blobImpl, contentType, size,
                                         true /* SameProcessBlobImpl */);
       }
@@ -3485,24 +3485,24 @@ BlobChild::GetOrCreateFromImpl(ChildMana
     ErrorResult rv;
     uint64_t length = aBlobImpl->GetSize(rv);
     MOZ_ASSERT(!rv.Failed());
 
     if (aBlobImpl->IsFile()) {
       nsAutoString name;
       aBlobImpl->GetName(name);
 
-      nsAutoString path;
-      aBlobImpl->GetPath(path);
+      nsAutoString domPath;
+      aBlobImpl->GetDOMPath(domPath);
 
       int64_t modDate = aBlobImpl->GetLastModified(rv);
       MOZ_ASSERT(!rv.Failed());
 
       blobParams =
-        FileBlobConstructorParams(name, contentType, path, length, modDate,
+        FileBlobConstructorParams(name, contentType, domPath, length, modDate,
                                   aBlobImpl->IsDirectory(), blobData);
     } else {
       blobParams = NormalBlobConstructorParams(contentType, length, blobData);
     }
   }
 
   auto* actor = new BlobChild(aManager, aBlobImpl);
 
@@ -4038,24 +4038,24 @@ BlobParent::GetOrCreateFromImpl(ParentMa
       ErrorResult rv;
       uint64_t length = aBlobImpl->GetSize(rv);
       MOZ_ASSERT(!rv.Failed());
 
       if (aBlobImpl->IsFile()) {
         nsAutoString name;
         aBlobImpl->GetName(name);
 
-        nsAutoString path;
-        aBlobImpl->GetPath(path);
+        nsAutoString domPath;
+        aBlobImpl->GetDOMPath(domPath);
 
         int64_t modDate = aBlobImpl->GetLastModified(rv);
         MOZ_ASSERT(!rv.Failed());
 
         blobParams =
-          FileBlobConstructorParams(name, contentType, path, length, modDate,
+          FileBlobConstructorParams(name, contentType, domPath, length, modDate,
                                     aBlobImpl->IsDirectory(), void_t());
       } else {
         blobParams = NormalBlobConstructorParams(contentType, length, void_t());
       }
     }
   }
 
   nsID id;

--- a/dom/file/moz.build
+++ b/dom/file/moz.build
@@ -18,16 +18,17 @@ EXPORTS += [
     'nsHostObjectURI.h',
 ]
 
 EXPORTS.mozilla.dom += [
     'BlobSet.h',
     'File.h',
     'FileList.h',
     'FileReader.h',
+    'MultipartBlobImpl.h',
     'MutableBlobStorage.h',
     'MutableBlobStreamListener.h',
 ]
 
 UNIFIED_SOURCES += [
     'BlobSet.cpp',
     'File.cpp',
     'FileList.cpp',

--- a/dom/filesystem/GetDirectoryListingTask.cpp
+++ b/dom/filesystem/GetDirectoryListingTask.cpp
@@ -247,17 +247,17 @@ GetDirectoryListingTaskParent::GetSucces
       // This is specific for unix root filesystem.
       if (!mDOMPath.EqualsLiteral(FILESYSTEM_DOM_PATH_SEPARATOR_LITERAL)) {
         filePath.AppendLiteral(FILESYSTEM_DOM_PATH_SEPARATOR_LITERAL);
       }
 
       nsAutoString name;
       blobImpl->GetName(name);
       filePath.Append(name);
-      blobImpl->SetPath(filePath);
+      blobImpl->SetDOMPath(filePath);
 
       fileData.blobParent() =
         BlobParent::GetOrCreate(mRequestParent->Manager(), blobImpl);
       inputs.AppendElement(fileData);
     } else {
       MOZ_ASSERT(mTargetData[i].mType == FileOrDirectoryPath::eDirectoryPath);
       FileSystemDirectoryListingResponseDirectory directoryData;
       directoryData.directoryRealPath() = mTargetData[i].mPath;

--- a/dom/filesystem/GetFilesHelper.cpp
+++ b/dom/filesystem/GetFilesHelper.cpp
@@ -272,27 +272,27 @@ GetFilesHelper::RunIO()
   MOZ_ASSERT(!mListingCompleted);
 
   nsCOMPtr<nsIFile> file;
   mErrorResult = NS_NewLocalFile(mDirectoryPath, true, getter_AddRefs(file));
   if (NS_WARN_IF(NS_FAILED(mErrorResult))) {
     return;
   }
 
-  nsAutoString path;
-  mErrorResult = file->GetLeafName(path);
+  nsAutoString leafName;
+  mErrorResult = file->GetLeafName(leafName);
   if (NS_WARN_IF(NS_FAILED(mErrorResult))) {
     return;
   }
 
-  if (path.IsEmpty()) {
-    path.AppendLiteral(FILESYSTEM_DOM_PATH_SEPARATOR_LITERAL);
-  }
+  nsAutoString domPath;
+  domPath.AssignLiteral(FILESYSTEM_DOM_PATH_SEPARATOR_LITERAL);
+  domPath.Append(leafName);
 
-  mErrorResult = ExploreDirectory(path, file);
+  mErrorResult = ExploreDirectory(domPath, file);
 }
 
 void
 GetFilesHelper::RunMainThread()
 {
   MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(!mDirectoryPath.IsEmpty());
   MOZ_ASSERT(!mListingCompleted);
@@ -379,17 +379,17 @@ GetFilesHelperBase::ExploreDirectory(con
     nsAutoString leafName;
     if (NS_WARN_IF(NS_FAILED(currFile->GetLeafName(leafName)))) {
       continue;
     }
     domPath.Append(leafName);
 
     if (isFile) {
       RefPtr<BlobImpl> blobImpl = new BlobImplFile(currFile);
-      blobImpl->SetPath(domPath);
+      blobImpl->SetDOMPath(domPath);
 
       if (!mTargetBlobImplArray.AppendElement(blobImpl, fallible)) {
         return NS_ERROR_OUT_OF_MEMORY;
       }
 
       continue;
     }
 

--- a/dom/filesystem/compat/FileSystemFileEntry.cpp
+++ b/dom/filesystem/compat/FileSystemFileEntry.cpp
@@ -2,43 +2,74 @@
 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* 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/. */
 
 #include "FileSystemFileEntry.h"
 #include "CallbackRunnables.h"
 #include "mozilla/dom/File.h"
+#include "mozilla/dom/MultipartBlobImpl.h"
 #include "mozilla/dom/FileSystemFileEntryBinding.h"
 
 namespace mozilla {
 namespace dom {
 
 namespace {
 
 class FileCallbackRunnable final : public Runnable
 {
 public:
-  FileCallbackRunnable(FileCallback* aCallback, File* aFile)
+  FileCallbackRunnable(FileCallback* aCallback, ErrorCallback* aErrorCallback,
+                       File* aFile)
     : mCallback(aCallback)
+    , mErrorCallback(aErrorCallback)
     , mFile(aFile)
   {
     MOZ_ASSERT(aCallback);
     MOZ_ASSERT(aFile);
   }
 
   NS_IMETHOD
   Run() override
   {
-    mCallback->HandleEvent(*mFile);
+    // Here we clone the File object.
+
+    nsAutoString name;
+    mFile->GetName(name);
+
+    nsAutoString type;
+    mFile->GetType(type);
+
+    nsTArray<RefPtr<BlobImpl>> blobImpls;
+    blobImpls.AppendElement(mFile->Impl());
+
+    ErrorResult rv;
+    RefPtr<BlobImpl> blobImpl =
+      MultipartBlobImpl::Create(Move(blobImpls), name, type, rv);
+    if (NS_WARN_IF(rv.Failed())) {
+      if (mErrorCallback) {
+        RefPtr<DOMException> exception =
+          DOMException::Create(rv.StealNSResult());
+        mErrorCallback->HandleEvent(*exception);
+      }
+
+      return NS_OK;
+    }
+
+    RefPtr<File> file = File::Create(mFile->GetParentObject(), blobImpl);
+    MOZ_ASSERT(file);
+
+    mCallback->HandleEvent(*file);
     return NS_OK;
   }
 
 private:
   RefPtr<FileCallback> mCallback;
+  RefPtr<ErrorCallback> mErrorCallback;
   RefPtr<File> mFile;
 };
 
 } // anonymous namespace
 
 NS_IMPL_CYCLE_COLLECTION_INHERITED(FileSystemFileEntry, FileSystemEntry, mFile)
 
 NS_IMPL_ADDREF_INHERITED(FileSystemFileEntry, FileSystemEntry)
@@ -72,17 +103,17 @@ void
 FileSystemFileEntry::GetName(nsAString& aName, ErrorResult& aRv) const
 {
   mFile->GetName(aName);
 }
 
 void
 FileSystemFileEntry::GetFullPath(nsAString& aPath, ErrorResult& aRv) const
 {
-  mFile->GetPath(aPath);
+  mFile->Impl()->GetDOMPath(aPath);
   if (aPath.IsEmpty()) {
     // We're under the root directory. webkitRelativePath
     // (implemented as GetPath) is for cases when file is selected because its
     // ancestor directory is selected. But that is not the case here, so need to
     // manually prepend '/'.
     nsAutoString name;
     mFile->GetName(name);
     aPath.AssignLiteral(FILESYSTEM_DOM_PATH_SEPARATOR_LITERAL);
@@ -90,15 +121,18 @@ FileSystemFileEntry::GetFullPath(nsAStri
   }
 }
 
 void
 FileSystemFileEntry::GetFile(FileCallback& aSuccessCallback,
                              const Optional<OwningNonNull<ErrorCallback>>& aErrorCallback) const
 {
   RefPtr<FileCallbackRunnable> runnable =
-    new FileCallbackRunnable(&aSuccessCallback, mFile);
+    new FileCallbackRunnable(&aSuccessCallback,
+                             aErrorCallback.WasPassed()
+                               ? &aErrorCallback.Value() : nullptr,
+                             mFile);
   DebugOnly<nsresult> rv = NS_DispatchToMainThread(runnable);
   NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "NS_DispatchToMainThread failed");
 }
 
 } // dom namespace
 } // mozilla namespace

--- a/dom/filesystem/compat/tests/test_basic.html
+++ b/dom/filesystem/compat/tests/test_basic.html
@@ -403,16 +403,35 @@ function test_getParent(entry, parentEnt
     } else {
       test_getParent(e, parentEntry, false);
     }
   }, function(e) {
     ok(false, "This should not happen.");
   });
 }
 
+function test_webkitRelativePath() {
+  fileEntry.file(function(file1) {
+    ok(file1, "We have a file here!");
+    ok(!file1.webkitRelativePath, "webkitRelativePath is an empty string");
+
+    fileEntry.file(function(file2) {
+      ok(file2, "We have a file here!");
+      ok(!file2.webkitRelativePath, "webkitRelativePath is an empty string");
+      isnot(file1, file2, "The 2 files are not the same");
+
+      next();
+    }, function() {
+      ok(false, "Something when wrong!");
+    });
+  }, function() {
+    ok(false, "Something when wrong!");
+  });
+}
+
 var tests = [
   setup_tests,
   populate_entries,
 
   test_entries,
 
   test_fileEntry,
   test_fileEntry_file,
@@ -447,16 +466,18 @@ var tests = [
 
   test_root_getDirectory_securityError,
   test_root_getDirectory_typeMismatchError,
   test_root_getDirectory_nonValidPath,
   test_root_getDirectory_nonExistingPath,
   test_root_getDirectory_simple,
   test_root_getDirectory_deep,
 
+  test_webkitRelativePath,
+
   cleanUpTestingFiles,
 ];
 
 function next() {
   if (!tests.length) {
     SimpleTest.finish();
     return;
   }

--- a/dom/filesystem/tests/filesystem_commons.js
+++ b/dom/filesystem/tests/filesystem_commons.js
@@ -1,12 +1,18 @@
 function createPath(parentDir, dirOrFile) {
   return parentDir.path + (parentDir.path == '/' ? '' : '/') + dirOrFile.name;
 }
 
+function createRelativePath(parentDir, dirOrFile) {
+  let path = createPath(parentDir, dirOrFile);
+  is(path[0], "/", "The full path should start with '/'");
+  return path.substring(1);
+}
+
 function setup_tests(aNext) {
   SimpleTest.requestLongerTimeout(2);
   SpecialPowers.pushPrefEnv({"set": [["dom.input.dirpicker", true],
                                      ["dom.webkitBlink.dirPicker.enabled", true]]}, aNext);
 }
 
 function test_basic(aDirectory, aNext) {
   ok(aDirectory, "Directory exists.");
@@ -24,17 +30,17 @@ function test_getFilesAndDirectories(aDi
           if (data[i] instanceof Directory) {
             isnot(data[i].name, '/', "Subdirectory should be called with the leafname");
             isnot(data[i].path, '/', "Subdirectory path should be called with the leafname");
             isnot(data[i].path, dir.path, "Subdirectory path should contain the parent path.");
             is(data[i].path, createPath(dir, data[i]), "Subdirectory path should be called parentdir.path + '/' + leafname: " + data[i].path);
           }
 
           if (data[i] instanceof File) {
-            is(data[i].webkitRelativePath, createPath(dir, data[i]), "File.webkitRelativePath should be called: parentdir.path + '/' + file.name: " + data[i].webkitRelativePath);
+            is(data[i].webkitRelativePath, createRelativePath(dir, data[i]), "File.webkitRelativePath should be called: parentdir.path + '/' + file.name: " + data[i].webkitRelativePath);
           }
         }
       }
     );
   }
 
   aDirectory.getFilesAndDirectories().then(
     function(data) {
@@ -46,34 +52,35 @@ function test_getFilesAndDirectories(aDi
           isnot(data[i].name, '/', "Subdirectory should be called with the leafname");
           is(data[i].path, createPath(aDirectory, data[i]), "Subdirectory path should be called parentdir.path + '/' + leafname: " + data[i].path);
           if (aRecursive) {
             promises.push(checkSubDir(data[i]));
           }
         }
 
         if (data[i] instanceof File) {
-          is(data[i].webkitRelativePath, createPath(aDirectory, data[i]), "File.webkitRelativePath should be called '/' + file.name: " + data[i].webkitRelativePath);
+          is(data[i].webkitRelativePath, createRelativePath(aDirectory, data[i]), "File.webkitRelativePath should be called file.name: " + data[i].webkitRelativePath);
         }
       }
 
       return Promise.all(promises);
     },
     function() {
       ok(false, "Something when wrong");
     }
   ).then(aNext);
 }
 
 function test_getFiles(aDirectory, aRecursive, aNext) {
   aDirectory.getFiles(aRecursive).then(
     function(data) {
       for (var i = 0; i < data.length; ++i) {
         ok(data[i] instanceof File, "File: " + data[i].name);
-        ok(data[i].webkitRelativePath.indexOf(aDirectory.path) == 0 &&
+        is(aDirectory.path[0], '/', "Directory path must start with '/'");
+        ok(data[i].webkitRelativePath.indexOf(aDirectory.path.substring(1)) == 0 &&
            data[i].webkitRelativePath.indexOf('/' + data[i].name) + ('/' + data[i].name).length == data[i].webkitRelativePath.length,
            "File.webkitRelativePath should be called dir.path + '/' + file.name: " + data[i].webkitRelativePath);
       }
     },
     function() {
       ok(false, "Something when wrong");
     }
   ).then(aNext);

--- a/dom/html/HTMLFormSubmission.cpp
+++ b/dom/html/HTMLFormSubmission.cpp
@@ -506,21 +506,21 @@ FSMultipartFormData::AddNameBlobOrNullPa
   nsAutoCString contentType;
   nsCOMPtr<nsIInputStream> fileStream;
 
   if (aBlob) {
     nsAutoString filename16;
 
     RefPtr<File> file = aBlob->ToFile();
     if (file) {
-      nsAutoString path;
-      file->GetPath(path);
+      nsAutoString relativePath;
+      file->GetRelativePath(relativePath);
       if (Directory::WebkitBlinkDirectoryPickerEnabled(nullptr, nullptr) &&
-          !path.IsEmpty()) {
-        filename16 = path;
+          !relativePath.IsEmpty()) {
+        filename16 = relativePath;
       }
 
       if (filename16.IsEmpty()) {
         RetrieveFileName(aBlob, filename16);
       }
     }
 
     rv = EncodeVal(filename16, filename, true);

--- a/dom/indexedDB/FileSnapshot.h
+++ b/dom/indexedDB/FileSnapshot.h
@@ -55,25 +55,25 @@ private:
   // BlobImpl
   virtual void
   GetName(nsAString& aName) const override
   {
     mBlobImpl->GetName(aName);
   }
 
   virtual void
-  GetPath(nsAString& aPath) const override
+  GetDOMPath(nsAString& aPath) const override
   {
-    mBlobImpl->GetPath(aPath);
+    mBlobImpl->GetDOMPath(aPath);
   }
 
   virtual void
-  SetPath(const nsAString& aPath) override
+  SetDOMPath(const nsAString& aPath) override
   {
-    mBlobImpl->SetPath(aPath);
+    mBlobImpl->SetDOMPath(aPath);
   }
 
   virtual int64_t
   GetLastModified(ErrorResult& aRv) override
   {
     return mBlobImpl->GetLastModified(aRv);
   }
 

--- a/dom/security/test/contentverifier/browser.ini
+++ b/dom/security/test/contentverifier/browser.ini
@@ -11,11 +11,9 @@ support-files =
   file_about_newtab_sri.html
   file_about_newtab_sri_signature
   goodChain.pem
   head.js
   script.js
   style.css
 
 [browser_verify_content_about_newtab.js]
-skip-if = true # This started permafailing randomly (Bug 1336654)
 [browser_verify_content_about_newtab2.js]
-skip-if = true # This started permafailing randomly (Bug 1336654)

--- a/dom/security/test/contentverifier/file_about_newtab_good_signature
+++ b/dom/security/test/contentverifier/file_about_newtab_good_signature
@@ -1,1 +1,1 @@
--mqpvTYdZX4HYQDW1nScojL7ICw5yj8UF2gzxyLbSCx9UIfHH-gWZ40F_PFtqjHxoC1J3dHDb3VedVhOYczdaLrNKbRvPrlnkdGx7Rl8qEBrtZpF1py1Z9uAGoCrgUHa
\ No newline at end of file
+HUndgHvxHNMiAe1SXoeyOOraUJCdxHqWkAYTu0Cq1KpAHcWZEVelNTvyXGbTLWj8btsmqNLAm08UlyK43q_2oO9DQfez3Fo8DhsKvm7TqgSXCkhUoxsYNanxWXhqw-Jw
\ No newline at end of file

--- a/dom/security/test/contentverifier/goodChain.pem
+++ b/dom/security/test/contentverifier/goodChain.pem
@@ -1,51 +1,51 @@
 -----BEGIN CERTIFICATE-----
-MIICUzCCAT2gAwIBAgIUNy0IWlDRDL53zwvj1lq0GCpIe2EwCwYJKoZIhvcNAQEL
-MBExDzANBgNVBAMMBmludC1DQTAiGA8yMDE0MTEyNzAwMDAwMFoYDzIwMTcwMjA0
+MIICUzCCAT2gAwIBAgIUJ1BtYqWRwUsVaZCGPp9eTHIC04QwCwYJKoZIhvcNAQEL
+MBExDzANBgNVBAMMBmludC1DQTAiGA8yMDE1MTEyODAwMDAwMFoYDzIwMTgwMjA1
 MDAwMDAwWjAUMRIwEAYDVQQDDAllZS1pbnQtQ0EwdjAQBgcqhkjOPQIBBgUrgQQA
 IgNiAAShaHJDNitcexiJ83kVRhWhxz+0je6GPgIpFdtgjiUt5LcTLajOmOgxU05q
 nAwLCcjWOa3oMgbluoE0c6EfozDgXajJbkOD/ieHPalxA74oiM/wAvBa9xof3cyD
 dKpuqc6jTjBMMBMGA1UdJQQMMAoGCCsGAQUFBwMDMDUGA1UdEQQuMCyCKnJlbW90
 ZW5ld3RhYi5jb250ZW50LXNpZ25hdHVyZS5tb3ppbGxhLm9yZzALBgkqhkiG9w0B
-AQsDggEBAIeB4WKghknsrow+lj3qzDiHrPBc9AMlb4aZvS6yzazmXr80rXxnsKkb
-ZV1PW/cU6xXH5srWHpfJwypvvYS74btNtuacjKVH2AJdua4482WQIi9gCkXIufRx
-2nSS6pYgYZ4vD+yG8v+3SCChOCXnLjRaN9WxMi8tldbOW9pH44O3vrSSL70pQ2Ph
-8ncUbUbCNNtYhtOe2Z4XT9Cswmfkf4OIQ3gy9eYK2ySEUWP+lHs9KnnNXrLcA/ae
-cSUdI00i3C3OS9yldeyNHzVb8mSsZ5d1WkJrkf/hnXWGrMHRTtlJlG7t7cN8S0Oi
-tQoinJyxrZ+zabFIyl/euDc+Y/dijOU=
+AQsDggEBALiLck6k50ok9ahVq45P3feY1PeUXcIYZkJd8aPDYM+0kfg5+JyJBykA
+mtHWPE1QQjs7VRMfaLfu04E4UJMI2V1AON1qtgR9BQLctW85KFACg2omfiCKwJh0
+5Q8cxBFx9BpNMayqLJwHttB6oluxZFTB8CL/hfpbYpHz1bMEDCVSRP588YBrc8mV
+OLqzQK+k3ewwGvfD6SvXmTny37MxqwxdTPFJNnpqzKAsQIvz8Skic9BkA1NFk0Oq
+lsKKoiibbOCmwS9XY/laAkBaC3winuhciYAC0ImAopZ4PBCU0AOHGrNbhZXWYQxt
+uHBj34FqvIRCqgM06JCEwN0ULgix4kI=
 -----END CERTIFICATE-----
 -----BEGIN CERTIFICATE-----
-MIIC0TCCAbugAwIBAgIULYyr3v/0zZ+XiR22NH7hOcnj2FcwCwYJKoZIhvcNAQEL
-MA0xCzAJBgNVBAMMAmNhMCIYDzIwMTQxMTI3MDAwMDAwWhgPMjAxNzAyMDQwMDAw
+MIIC0TCCAbugAwIBAgIUPcKbBQpKwTzrrlqzM+d3z5DWiNUwCwYJKoZIhvcNAQEL
+MA0xCzAJBgNVBAMMAmNhMCIYDzIwMTUxMTI4MDAwMDAwWhgPMjAxODAyMDUwMDAw
 MDBaMBExDzANBgNVBAMMBmludC1DQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCC
 AQoCggEBALqIUahEjhbWQf1utogGNhA9PBPZ6uQ1SrTs9WhXbCR7wcclqODYH72x
 nAabbhqG8mvir1p1a2pkcQh6pVqnRYf3HNUknAJ+zUP8HmnQOCApk6sgw0nk27lM
 wmtsDu0Vgg/xfq1pGrHTAjqLKkHup3DgDw2N/WYLK7AkkqR9uYhheZCxV5A90jvF
 4LhIH6g304hD7ycW2FW3ZlqqfgKQLzp7EIAGJMwcbJetlmFbt+KWEsB1MaMMkd20
 yvf8rR0l0wnvuRcOp2jhs3svIm9p47SKlWEd7ibWJZ2rkQhONsscJAQsvxaLL+Xx
 j5kXMbiz/kkj+nJRxDHVA6zaGAo17Y0CAwEAAaMlMCMwDAYDVR0TBAUwAwEB/zAT
-BgNVHSUEDDAKBggrBgEFBQcDAzALBgkqhkiG9w0BAQsDggEBADfRBKSM08JF6vqz
-0EA+KNc0XIEAWApuHuwX6XXWeLgo6QN4E/9qfrsaO+C366WT+JDsjDOi40wW46SA
-XbguxtZQeZasNDUWp/leZix4RSJoHB7OllG1rgZJfN76zKVaXRGUmyQObkMMOJZe
-wIA0OBURT8ik9Z89pD0IWrqscds71Edfjt0hHgg63wVvIaklReZXvFOD3VmSCPNn
-2wB6ZzECcbhJpnzxZdsoMSGH0C6apYnNNTjqZjO90JVm/Ph/7nbi/KncYXA6ccl6
-Jz2mfiAquWIua2+CzBGbqjZVSATTpWCp+cXQJE1xka+hWUaL5HPTq1bTULRFlauZ
-HGl5lJk=
+BgNVHSUEDDAKBggrBgEFBQcDAzALBgkqhkiG9w0BAQsDggEBADDPjITgz8joxLRW
+wpLxELKSgO/KQ6iAXztjMHq9ovT7Fy0fqBnQ1mMVFr+sBXLgtUCM45aip6PjhUXc
+zs5Dq5STg+kz7qtmAjEQvOPcyictbgdu/K7+uMhXQhlzhOgyW88Uk5vrAezNTc/e
+TvSmWp1FcgVAfaeMN/90nzD1KIHoUt7zqZIz9ub8jXPVzQNZq4vh33smZhmbdTdV
+DaHUyef5cR1VTEGB+L1qzUIQqpHmD4UkMNP1nYedWfauiQhRt6Ql3rJSCRuEvsOA
+iBTJlwai/EFwfyfHkOV2GNgv+A5wHHEjBtF5c4PCxQEL5Vw+mfZHLsDVqF3279ZY
+lQ6jQ9g=
 -----END CERTIFICATE-----
 -----BEGIN CERTIFICATE-----
-MIICzTCCAbegAwIBAgIUIVkGGA8HiO3RIKGjdOjVi+d6EVkwCwYJKoZIhvcNAQEL
-MA0xCzAJBgNVBAMMAmNhMCIYDzIwMTQxMTI3MDAwMDAwWhgPMjAxNzAyMDQwMDAw
+MIICzTCCAbegAwIBAgIUKRLJoCmk0A6PHrNc8CxFn//4BYcwCwYJKoZIhvcNAQEL
+MA0xCzAJBgNVBAMMAmNhMCIYDzIwMTUxMTI4MDAwMDAwWhgPMjAxODAyMDUwMDAw
 MDBaMA0xCzAJBgNVBAMMAmNhMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC
 AQEAuohRqESOFtZB/W62iAY2ED08E9nq5DVKtOz1aFdsJHvBxyWo4NgfvbGcBptu
 Gobya+KvWnVramRxCHqlWqdFh/cc1SScAn7NQ/weadA4ICmTqyDDSeTbuUzCa2wO
 7RWCD/F+rWkasdMCOosqQe6ncOAPDY39ZgsrsCSSpH25iGF5kLFXkD3SO8XguEgf
 qDfTiEPvJxbYVbdmWqp+ApAvOnsQgAYkzBxsl62WYVu34pYSwHUxowyR3bTK9/yt
 HSXTCe+5Fw6naOGzey8ib2njtIqVYR3uJtYlnauRCE42yxwkBCy/Fosv5fGPmRcx
 uLP+SSP6clHEMdUDrNoYCjXtjQIDAQABoyUwIzAMBgNVHRMEBTADAQH/MBMGA1Ud
-JQQMMAoGCCsGAQUFBwMDMAsGCSqGSIb3DQEBCwOCAQEAlpbRzRIPnf43AwGfMvKP
-zOtntRy2nE9GlmY9I00uioHUnUrPLs8aw3UDtyiDWMGqcYysXGx9EX2Vk0POS4gf
-G6PA95F6GxTtbzIEZmTPVuzA/cfc9HU3HXDPqh+dySJ8/Ta4c4vX1lgeGGAvstNe
-q+9DaCGXs8MqMF8KtXNmOm3eS9q622hKEvTVEoxqj1t365kwKHaNpbObddQ6Xcny
-akvfh2L+8QbJSflcm8fL/JTup/2/cRG1ytOsaiXEr9JBEITOtQO0Ot/4Qzq+MJjv
-weaJ3hZ0c+cTy3tEvt+I7+lnW4Q5dB7aLR2/BZfLubhxz1SUVMuHfLH64fc0Uf1Q
-Nw==
+JQQMMAoGCCsGAQUFBwMDMAsGCSqGSIb3DQEBCwOCAQEAABgMK6EyVIXTjD5qaxPO
+DWz6yREACmAQBcowKWvfhwgi27DPSXyFGDbzTPEo+7RrIcXJkVAhLouGT51fCwTZ
+zb6Sgf6ztX7VSppY9AT4utvlZKP1xQ5WhIYsMtdHCHLHIkRjeWyoBEfUx50UXNLK
+Snl+A02GKYWiX+TLLg2DPN2s7v/mm8NLMQNgUlL7KakB2FHFyPa8otPpL4llg7UJ
+iBTVQ0c3JoiVbwZaY1Z8QinfMXUrTK9egUC4BAcId1dE8glzA5RRlw1fTLWpGApt
+hUmbDnl9N2a9NhGX323ypNzIATexafipzWe7bc4u/+bFdrUqnKUoEka73pZBdHdA
+FQ==
 -----END CERTIFICATE-----

--- a/dom/security/test/contentverifier/head.js
+++ b/dom/security/test/contentverifier/head.js
@@ -78,17 +78,17 @@ function* doTest(aExpectedStrings, reloa
     aboutNewTabService.newTabURL = aNewTabPref;
   }
 
   // set prefs
   yield pushPrefs(
       ["browser.newtabpage.remote.content-signing-test", true],
       ["browser.newtabpage.remote", true],
       ["security.content.signature.root_hash",
-       "65:AE:D8:1E:B5:12:AE:B0:6B:38:58:BC:7C:47:35:3D:D4:EA:25:F1:63:DA:08:BB:86:3A:2E:97:39:66:8F:55"]);
+       "CC:BE:04:87:74:B2:98:24:4A:C6:7A:71:BC:6F:DB:D6:C0:48:17:29:57:51:96:47:38:CC:24:C8:E4:F9:DD:CB"]);
 
   if (aNewTabPref === URI_BAD_CSP) {
     // Use stricter CSP to test CSP violation.
     yield pushPrefs(["security.signed_content.CSP.default", "script-src 'self'; style-src 'self'"]);
   } else {
     // Use weaker CSP to test normal content.
     yield pushPrefs(["security.signed_content.CSP.default", "script-src 'self' 'unsafe-inline'; style-src 'self'"]);
   }

--- a/dom/webidl/File.webidl
+++ b/dom/webidl/File.webidl
@@ -28,17 +28,17 @@ dictionary ChromeFilePropertyBag : FileP
   DOMString name = "";
 };
 
 // Mozilla extensions
 partial interface File {
   [GetterThrows, Deprecated="FileLastModifiedDate"]
   readonly attribute Date lastModifiedDate;
 
-  [BinaryName="path", Func="mozilla::dom::Directory::WebkitBlinkDirectoryPickerEnabled"]
+  [BinaryName="relativePath", Func="mozilla::dom::Directory::WebkitBlinkDirectoryPickerEnabled"]
   readonly attribute USVString webkitRelativePath;
 
   [GetterThrows, ChromeOnly, NeedsCallerType]
   readonly attribute DOMString mozFullPath;
 
   [ChromeOnly, Throws, NeedsCallerType]
   static File createFromNsIFile(nsIFile file,
                                 optional ChromeFilePropertyBag options);

--- a/dom/workers/ServiceWorkerContainer.cpp
+++ b/dom/workers/ServiceWorkerContainer.cpp
@@ -44,17 +44,17 @@ ServiceWorkerContainer::IsEnabled(JSCont
 
   JS::Rooted<JSObject*> global(aCx, aGlobal);
   nsCOMPtr<nsPIDOMWindowInner> window = Navigator::GetWindowFromGlobal(global);
   if (!window) {
     return false;
   }
 
   nsIDocument* doc = window->GetExtantDoc();
-  if (!doc || doc->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId) {
+  if (!doc || nsContentUtils::IsInPrivateBrowsing(doc)) {
     return false;
   }
 
   return Preferences::GetBool("dom.serviceWorkers.enabled", false);
 }
 
 ServiceWorkerContainer::ServiceWorkerContainer(nsPIDOMWindowInner* aWindow)
   : DOMEventTargetHelper(aWindow)

--- a/dom/workers/ServiceWorkerManager.cpp
+++ b/dom/workers/ServiceWorkerManager.cpp
@@ -1649,20 +1649,21 @@ ServiceWorkerManager::FlushReportsToAllC
       continue;
     }
 
     nsCOMPtr<nsIDocument> doc = do_QueryInterface(iter.Key());
     if (!doc || !doc->IsCurrentActiveDocument() || !doc->GetWindow()) {
       continue;
     }
 
-    windows.AppendElement(doc->InnerWindowID());
-
-    aReporter->FlushConsoleReports(doc,
-                                   nsIConsoleReportCollector::ReportAction::Save);
+    uint64_t innerWindowId = doc->InnerWindowID();
+    windows.AppendElement(innerWindowId);
+
+    aReporter->FlushReportsToConsole(
+      innerWindowId, nsIConsoleReportCollector::ReportAction::Save);
   }
 
   // Report to any documents that have called .register() for this scope.  They
   // may not be controlled, but will still want to see error reports.
   WeakDocumentList* regList = mRegisteringDocuments.Get(aScope);
   if (regList) {
     for (int32_t i = regList->Length() - 1; i >= 0; --i) {
       nsCOMPtr<nsIDocument> doc = do_QueryReferent(regList->ElementAt(i));
@@ -1677,18 +1678,18 @@ ServiceWorkerManager::FlushReportsToAllC
 
       uint64_t innerWindowId = doc->InnerWindowID();
       if (windows.Contains(innerWindowId)) {
         continue;
       }
 
       windows.AppendElement(innerWindowId);
 
-      aReporter->FlushConsoleReports(doc,
-                                     nsIConsoleReportCollector::ReportAction::Save);
+      aReporter->FlushReportsToConsole(
+        innerWindowId, nsIConsoleReportCollector::ReportAction::Save);
     }
 
     if (regList->IsEmpty()) {
       regList = nullptr;
       nsAutoPtr<WeakDocumentList> doomed;
       mRegisteringDocuments.RemoveAndForget(aScope, doomed);
     }
   }
@@ -1707,25 +1708,25 @@ ServiceWorkerManager::FlushReportsToAllC
 
       uint64_t innerWindowId = nsContentUtils::GetInnerWindowID(inner);
       if (innerWindowId == 0 || windows.Contains(innerWindowId)) {
         continue;
       }
 
       windows.AppendElement(innerWindowId);
 
-      aReporter->FlushReportsByWindowId(innerWindowId,
-                                        nsIConsoleReportCollector::ReportAction::Save);
+      aReporter->FlushReportsToConsole(
+        innerWindowId, nsIConsoleReportCollector::ReportAction::Save);
     }
   }
 
   // If there are no documents to report to, at least report something to the
   // browser console.
   if (windows.IsEmpty()) {
-    aReporter->FlushConsoleReports((nsIDocument*)nullptr);
+    aReporter->FlushReportsToConsole(0);
     return;
   }
 
   aReporter->ClearConsoleReports();
 }
 
 void
 ServiceWorkerManager::HandleError(JSContext* aCx,
@@ -2555,17 +2556,17 @@ ServiceWorkerManager::IsAvailable(nsIPri
   return registration && registration->GetActive();
 }
 
 bool
 ServiceWorkerManager::IsControlled(nsIDocument* aDoc, ErrorResult& aRv)
 {
   MOZ_ASSERT(aDoc);
 
-  if (aDoc->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId) {
+  if (nsContentUtils::IsInPrivateBrowsing(aDoc)) {
     // Handle the case where a service worker was previously registered in
     // a non-private window (bug 1255621).
     return false;
   }
 
   RefPtr<ServiceWorkerRegistrationInfo> registration;
   nsresult rv = GetDocumentRegistration(aDoc, getter_AddRefs(registration));
   if (NS_WARN_IF(NS_FAILED(rv) && rv != NS_ERROR_NOT_AVAILABLE)) {

--- a/dom/workers/WorkerPrivate.cpp
+++ b/dom/workers/WorkerPrivate.cpp
@@ -3730,25 +3730,26 @@ WorkerPrivateParent<Derived>::FlushRepor
   }
 
   bool reportErrorToBrowserConsole = true;
 
   // Flush the reports.
   for (uint32_t index = 0; index < windowActions.Length(); index++) {
     WindowAction& windowAction = windowActions[index];
 
-    aReporter->FlushConsoleReports(windowAction.mWindow->GetExtantDoc(),
-                                   nsIConsoleReportCollector::ReportAction::Save);
+    aReporter->FlushReportsToConsole(
+      windowAction.mWindow->WindowID(),
+      nsIConsoleReportCollector::ReportAction::Save);
     reportErrorToBrowserConsole = false;
   }
 
   // Finally report to broswer console if there is no any window or shared
   // worker.
   if (reportErrorToBrowserConsole) {
-    aReporter->FlushConsoleReports((nsIDocument*)nullptr);
+    aReporter->FlushReportsToConsole(0);
     return;
   }
 
   aReporter->ClearConsoleReports();
 }
 
 template <class Derived>
 NS_IMPL_ADDREF_INHERITED(WorkerPrivateParent<Derived>, DOMEventTargetHelper)

new file mode 100644
--- /dev/null
+++ b/embedding/moz.build
@@ -0,0 +1,3 @@
+with Files("**"):
+    BUG_COMPONENT = ("Core", "General")
+

--- a/gfx/skia/skia/src/ports/SkScalerContext_win_dw.cpp
+++ b/gfx/skia/skia/src/ports/SkScalerContext_win_dw.cpp
@@ -677,20 +677,23 @@ static void bilevel_to_bw(const uint8_t*
 template<bool APPLY_PREBLEND>
 static void rgb_to_a8(const uint8_t* SK_RESTRICT src, const SkGlyph& glyph, const uint8_t* table8) {
     const size_t dstRB = glyph.rowBytes();
     const U16CPU width = glyph.fWidth;
     uint8_t* SK_RESTRICT dst = static_cast<uint8_t*>(glyph.fImage);
 
     for (U16CPU y = 0; y < glyph.fHeight; y++) {
         for (U16CPU i = 0; i < width; i++) {
-            U8CPU r = *(src++);
-            U8CPU g = *(src++);
-            U8CPU b = *(src++);
-            dst[i] = sk_apply_lut_if<APPLY_PREBLEND>((r + g + b) / 3, table8);
+            U8CPU g = src[1];
+            src += 3;
+
+            // Ignore the R, B channels. It looks the closest to what
+            // D2D with grayscale AA has. But there's no way
+            // to just get a grayscale AA alpha texture from a glyph run.
+            dst[i] = sk_apply_lut_if<APPLY_PREBLEND>(g, table8);
         }
         dst = (uint8_t*)((char*)dst + dstRB);
     }
 }
 
 template<bool APPLY_PREBLEND, bool RGB>
 static void rgb_to_lcd16(const uint8_t* SK_RESTRICT src, const SkGlyph& glyph,
                          const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) {

--- a/gfx/thebes/gfxFont.cpp
+++ b/gfx/thebes/gfxFont.cpp
@@ -2068,25 +2068,25 @@ gfxFont::Draw(const gfxTextRun *aTextRun
         if (aTextRun->UseCenterBaseline()) {
             gfxPoint baseAdj(0, (metrics.emAscent - metrics.emDescent) / 2);
             mat.Translate(baseAdj);
         }
 
         aRunParams.context->SetMatrix(mat);
     }
 
-    UniquePtr<SVGContextPaint> contextPaint;
+    RefPtr<SVGContextPaint> contextPaint;
     if (fontParams.haveSVGGlyphs && !fontParams.contextPaint) {
         // If no pattern is specified for fill, use the current pattern
         NS_ASSERTION((int(aRunParams.drawMode) & int(DrawMode::GLYPH_STROKE)) == 0,
                      "no pattern supplied for stroking text");
         RefPtr<gfxPattern> fillPattern = aRunParams.context->GetPattern();
-        contextPaint.reset(
+        contextPaint =
             new SimpleTextContextPaint(fillPattern, nullptr,
-                                       aRunParams.context->CurrentMatrix()));
+                                       aRunParams.context->CurrentMatrix());
         fontParams.contextPaint = contextPaint.get();
     }
 
     // Synthetic-bold strikes are each offset one device pixel in run direction.
     // (these values are only needed if IsSyntheticBold() is true)
     if (IsSyntheticBold()) {
         double xscale = CalcXScale(aRunParams.context->GetDrawTarget());
         fontParams.synBoldOnePixelOffset = aRunParams.direction * xscale;

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/Cargo.toml
@@ -0,0 +1,44 @@
+[package]
+name = "webrender"
+version = "0.11.1"
+authors = ["Glenn Watson <gw@intuitionlibrary.com>"]
+license = "MPL-2.0"
+repository = "https://github.com/servo/webrender"
+build = "build.rs"
+workspace = ".."
+
+[features]
+default = ["codegen", "freetype-lib"]
+codegen = ["webrender_traits/codegen"]
+freetype-lib = ["freetype/servo-freetype-sys"]
+serde_derive = ["webrender_traits/serde_derive"]
+
+[dependencies]
+app_units = "0.3"
+bincode = "0.6"
+bit-set = "0.4"
+byteorder = "0.5"
+euclid = "0.10.3"
+fnv="1.0"
+gleam = "0.2.30"
+lazy_static = "0.2"
+log = "0.3"
+num-traits = "0.1.32"
+offscreen_gl_context = {version = "0.5", features = ["serde_serialization", "osmesa"]}
+time = "0.1"
+threadpool = "1.3.2"
+webrender_traits = {path = "../webrender_traits", default-features = false}
+bitflags = "0.7"
+
+[dev-dependencies]
+angle = {git = "https://github.com/servo/angle", branch = "servo"}
+
+[target.'cfg(any(target_os = "android", all(unix, not(target_os = "macos"))))'.dependencies]
+freetype = { version = "0.2", default-features = false }
+
+[target.'cfg(target_os = "windows")'.dependencies]
+dwrote = "0.1.5"
+
+[target.'cfg(target_os = "macos")'.dependencies]
+core-graphics = "0.5.0"
+core-text = "2.0"

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/build.rs
@@ -0,0 +1,54 @@
+/* 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/. */
+
+use std::env;
+use std::path::{Path, PathBuf};
+use std::io::prelude::*;
+use std::fs::{canonicalize, read_dir, File};
+
+fn write_shaders(glsl_files: Vec<PathBuf>, shader_file_path: &Path) {
+    let mut shader_file = File::create(shader_file_path).unwrap();
+
+    write!(shader_file, "/// AUTO GENERATED BY build.rs\n\n").unwrap();
+    write!(shader_file, "use std::collections::HashMap;\n").unwrap();
+    write!(shader_file, "lazy_static! {{\n").unwrap();
+    write!(shader_file, "  pub static ref SHADERS: HashMap<&'static str, &'static str> = {{\n").unwrap();
+    write!(shader_file, "    let mut h = HashMap::with_capacity({});\n", glsl_files.len()).unwrap();
+    for glsl in glsl_files {
+        let shader_name = glsl.file_name().unwrap().to_str().unwrap();
+        // strip .glsl
+        let shader_name = shader_name.replace(".glsl", "");
+        let full_path = canonicalize(&glsl).unwrap();
+        let full_name = full_path.as_os_str().to_str().unwrap();
+        // if someone is building on a network share, I'm sorry.
+        let full_name = full_name.replace("\\\\?\\", "");
+        let full_name = full_name.replace("\\", "/");
+        write!(shader_file, "    h.insert(\"{}\", include_str!(\"{}\"));\n",
+               shader_name, full_name).unwrap();
+    }
+    write!(shader_file, "    h\n").unwrap(); 
+    write!(shader_file, "  }};\n").unwrap(); 
+    write!(shader_file, "}}\n").unwrap(); 
+}
+
+fn main() {
+    let out_dir = env::var("OUT_DIR").unwrap_or("out".to_owned());
+
+    let shaders_file = Path::new(&out_dir).join("shaders.rs");
+    let mut glsl_files = vec![];
+
+    println!("cargo:rerun-if-changed=res");
+    let res_dir = Path::new("res");
+    for entry in read_dir(res_dir).unwrap() {
+        let entry = entry.unwrap();
+        let path = entry.path();
+
+        if entry.file_name().to_str().unwrap().ends_with(".glsl") {
+            println!("cargo:rerun-if-changed={}", path.display());
+            glsl_files.push(path.to_owned());
+        }
+    }
+
+    write_shaders(glsl_files, &shaders_file);
+}

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/clip_shared.glsl
@@ -0,0 +1,91 @@
+#line 1
+/* 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/. */
+
+#ifdef WR_VERTEX_SHADER
+
+#define SEGMENT_ALL         0
+#define SEGMENT_CORNER_TL   1
+#define SEGMENT_CORNER_TR   2
+#define SEGMENT_CORNER_BL   3
+#define SEGMENT_CORNER_BR   4
+
+in int aClipRenderTaskIndex;
+in int aClipLayerIndex;
+in int aClipDataIndex;
+in int aClipSegmentIndex;
+
+struct CacheClipInstance {
+    int render_task_index;
+    int layer_index;
+    int data_index;
+    int segment_index;
+};
+
+CacheClipInstance fetch_clip_item(int index) {
+    CacheClipInstance cci;
+
+    cci.render_task_index = aClipRenderTaskIndex;
+    cci.layer_index = aClipLayerIndex;
+    cci.data_index = aClipDataIndex;
+    cci.segment_index = aClipSegmentIndex;
+
+    return cci;
+}
+
+// The transformed vertex function that always covers the whole clip area,
+// which is the intersection of all clip instances of a given primitive
+TransformVertexInfo write_clip_tile_vertex(vec4 local_clip_rect,
+                                           Layer layer,
+                                           ClipArea area,
+                                           int segment_index) {
+    vec2 lp0_base = local_clip_rect.xy;
+    vec2 lp1_base = local_clip_rect.xy + local_clip_rect.zw;
+
+    vec2 lp0 = clamp_rect(lp0_base, layer.local_clip_rect);
+    vec2 lp1 = clamp_rect(lp1_base, layer.local_clip_rect);
+    vec4 clipped_local_rect = vec4(lp0, lp1 - lp0);
+
+    vec2 outer_p0 = area.screen_origin_target_index.xy;
+    vec2 outer_p1 = outer_p0 + area.task_bounds.zw - area.task_bounds.xy;
+    vec2 inner_p0 = area.inner_rect.xy;
+    vec2 inner_p1 = area.inner_rect.zw;
+
+    vec2 p0, p1;
+    switch (segment_index) {
+        case SEGMENT_ALL:
+            p0 = outer_p0;
+            p1 = outer_p1;
+            break;
+        case SEGMENT_CORNER_TL:
+            p0 = outer_p0;
+            p1 = inner_p0;
+            break;
+        case SEGMENT_CORNER_BL:
+            p0 = vec2(outer_p0.x, outer_p1.y);
+            p1 = vec2(inner_p0.x, inner_p1.y);
+            break;
+        case SEGMENT_CORNER_TR:
+            p0 = vec2(outer_p1.x, outer_p1.y);
+            p1 = vec2(inner_p1.x, inner_p1.y);
+            break;
+        case SEGMENT_CORNER_BR:
+            p0 = vec2(outer_p1.x, outer_p0.y);
+            p1 = vec2(inner_p1.x, inner_p0.y);
+            break;
+    }
+
+    vec2 actual_pos = mix(p0, p1, aPosition.xy);
+
+    vec4 layer_pos = get_layer_pos(actual_pos / uDevicePixelRatio, layer);
+
+    // compute the point position in side the layer, in CSS space
+    vec2 vertex_pos = actual_pos + area.task_bounds.xy - area.screen_origin_target_index.xy;
+
+    gl_Position = uTransform * vec4(vertex_pos, 0.0, 1);
+
+    return TransformVertexInfo(layer_pos.xyw, actual_pos, clipped_local_rect);
+}
+
+#endif //WR_VERTEX_SHADER

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_blur.fs.glsl
@@ -0,0 +1,40 @@
+#line 1
+/* 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/. */
+
+// TODO(gw): Write a fast path blur that handles smaller blur radii
+//           with a offset / weight uniform table and a constant
+//           loop iteration count!
+
+// TODO(gw): Make use of the bilinear sampling trick to reduce
+//           the number of texture fetches needed for a gaussian blur.
+
+float gauss(float x, float sigma) {
+    return (1.0 / sqrt(6.283185307179586 * sigma * sigma)) * exp(-(x * x) / (2.0 * sigma * sigma));
+}
+
+void main(void) {
+    vec4 cache_sample = texture(sCache, vUv);
+    vec4 color = vec4(cache_sample.rgb, 1.0) * (cache_sample.a * gauss(0.0, vSigma));
+
+    for (int i=1 ; i < vBlurRadius ; ++i) {
+        vec2 offset = vec2(float(i)) * vOffsetScale;
+
+        vec2 st0 = clamp(vUv.xy + offset, vUvRect.xy, vUvRect.zw);
+        vec4 color0 = texture(sCache, vec3(st0, vUv.z));
+
+        vec2 st1 = clamp(vUv.xy - offset, vUvRect.xy, vUvRect.zw);
+        vec4 color1 = texture(sCache, vec3(st1, vUv.z));
+
+        // Alpha must be premultiplied in order to properly blur the alpha channel.
+        float weight = gauss(float(i), vSigma);
+        color += vec4(color0.rgb * color0.a, color0.a) * weight;
+        color += vec4(color1.rgb * color1.a, color1.a) * weight;
+    }
+
+    // Unpremultiply the alpha.
+    color.rgb /= color.a;
+
+    oFragColor = color;
+}

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_blur.glsl
@@ -0,0 +1,10 @@
+#line 1
+/* 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/. */
+
+varying vec3 vUv;
+flat varying vec4 vUvRect;
+flat varying vec2 vOffsetScale;
+flat varying float vSigma;
+flat varying int vBlurRadius;

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_blur.vs.glsl
@@ -0,0 +1,65 @@
+#line 1
+/* 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/. */
+
+// Applies a separable gaussian blur in one direction, as specified
+// by the dir field in the blur command.
+
+#define DIR_HORIZONTAL  0
+#define DIR_VERTICAL    1
+
+in int aBlurRenderTaskIndex;
+in int aBlurSourceTaskIndex;
+in int aBlurDirection;
+
+struct BlurCommand {
+    int task_id;
+    int src_task_id;
+    int dir;
+};
+
+BlurCommand fetch_blur() {
+    BlurCommand blur;
+
+    blur.task_id = aBlurRenderTaskIndex;
+    blur.src_task_id = aBlurSourceTaskIndex;
+    blur.dir = aBlurDirection;
+
+    return blur;
+}
+
+void main(void) {
+    BlurCommand cmd = fetch_blur();
+    RenderTaskData task = fetch_render_task(cmd.task_id);
+    RenderTaskData src_task = fetch_render_task(cmd.src_task_id);
+
+    vec4 local_rect = task.data0;
+
+    vec2 pos = mix(local_rect.xy,
+                   local_rect.xy + local_rect.zw,
+                   aPosition.xy);
+
+    vec2 texture_size = vec2(textureSize(sCache, 0).xy);
+    vUv.z = src_task.data1.x;
+    vBlurRadius = int(task.data1.y);
+    vSigma = task.data1.y * 0.5;
+
+    switch (cmd.dir) {
+        case DIR_HORIZONTAL:
+            vOffsetScale = vec2(1.0 / texture_size.x, 0.0);
+            break;
+        case DIR_VERTICAL:
+            vOffsetScale = vec2(0.0, 1.0 / texture_size.y);
+            break;
+    }
+
+    vUvRect = vec4(src_task.data0.xy, src_task.data0.xy + src_task.data0.zw);
+    vUvRect /= texture_size.xyxy;
+
+    vec2 uv0 = src_task.data0.xy / texture_size;
+    vec2 uv1 = (src_task.data0.xy + src_task.data0.zw) / texture_size;
+    vUv.xy = mix(uv0, uv1, aPosition.xy);
+
+    gl_Position = uTransform * vec4(pos, 0.0, 1.0);
+}

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_box_shadow.fs.glsl
@@ -0,0 +1,148 @@
+#line 1
+/* 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/. */
+
+// See http://asciimath.org to render the equations here.
+
+// The Gaussian function used for blurring:
+//
+//     G_sigma(x) = 1/sqrt(2 pi sigma^2) e^(-x^2/(2 sigma^2))
+float gauss(float x, float sigma) {
+    float sigmaPow2 = sigma * sigma;
+    return 1.0 / sqrt(6.283185307179586 * sigmaPow2) * exp(-(x * x) / (2.0 * sigmaPow2));
+}
+
+// An approximation of the error function, which is related to the integral of the Gaussian
+// function:
+//
+//     "erf"(x) = 2/sqrt(pi) int_0^x e^(-t^2) dt
+//              ~~ 1 - 1 / (1 + a_1 x + a_2 x^2 + a_3 x^3 + a_4 x^4)^4
+//
+// where:
+//
+//     a_1 = 0.278393, a_2 = 0.230389, a_3 = 0.000972, a_4 = 0.078108
+//
+// This approximation is accurate to `5 xx 10^-4`, more than accurate enough for our purposes.
+//
+// See: https://en.wikipedia.org/wiki/Error_function#Approximation_with_elementary_functions
+float erf(float x) {
+    bool negative = x < 0.0;
+    if (negative)
+        x = -x;
+    float x2 = x * x;
+    float x3 = x2 * x;
+    float x4 = x2 * x2;
+    float denom = 1.0 + 0.278393 * x + 0.230389 * x2 + 0.000972 * x3 + 0.078108 * x4;
+    float result = 1.0 - 1.0 / (denom * denom * denom * denom);
+    return negative ? -result : result;
+}
+
+// A useful helper for calculating integrals of the Gaussian function via the error function:
+//
+//      "erf"_sigma(x) = 2 int 1/sqrt(2 pi sigma^2) e^(-x^2/(2 sigma^2)) dx
+//                     = "erf"(x/(sigma sqrt(2)))
+float erfSigma(float x, float sigma) {
+    return erf(x / (sigma * 1.4142135623730951));
+}
+
+// Returns the blurred color value from the box itself (not counting any rounded corners). `p_0` is
+// the vector distance to the top left corner of the box; `p_1` is the vector distance to its
+// bottom right corner.
+//
+//      "colorFromRect"_sigma(p_0, p_1)
+//          = int_{p_{0_y}}^{p_{1_y}} int_{p_{1_x}}^{p_{0_x}} G_sigma(y) G_sigma(x) dx dy
+//          = 1/4 ("erf"_sigma(p_{1_x}) - "erf"_sigma(p_{0_x}))
+//              ("erf"_sigma(p_{1_y}) - "erf"_sigma(p_{0_y}))
+float colorFromRect(vec2 p0, vec2 p1, float sigma) {
+    return (erfSigma(p1.x, sigma) - erfSigma(p0.x, sigma)) *
+        (erfSigma(p1.y, sigma) - erfSigma(p0.y, sigma)) / 4.0;
+}
+
+// Returns the `x` coordinate on the ellipse with the given radii for the given `y` coordinate:
+//
+//      "ellipsePoint"(y, y_0, a, b) = a sqrt(1 - ((y - y_0) / b)^2)
+float ellipsePoint(float y, float y0, vec2 radii) {
+    float bStep = (y - y0) / radii.y;
+    return radii.x * sqrt(1.0 - bStep * bStep);
+}
+
+// A helper function to compute the value that needs to be subtracted to accommodate the border
+// corners.
+//
+//     "colorCutout"_sigma(x_{0_l}, x_{0_r}, y_0, y_{min}, y_{max}, a, b)
+//          = int_{y_{min}}^{y_{max}}
+//              int_{x_{0_r} + "ellipsePoint"(y, y_0, a, b)}^{x_{0_r} + a} G_sigma(y) G_sigma(x) dx
+//              + int_{x_{0_l} - a}^{x_{0_l} - "ellipsePoint"(y, y_0, a, b)} G_sigma(y) G_sigma(x)
+//                  dx dy
+//          = int_{y_{min}}^{y_{max}} 1/2 G_sigma(y)
+//              ("erf"_sigma(x_{0_r} + a) - "erf"_sigma(x_{0_r} + "ellipsePoint"(y, y_0, a, b)) +
+//               "erf"_sigma(x_{0_l} - "ellipsePoint"(y, y_0, a, b)) - "erf"_sigma(x_{0_l} - a))
+//
+// with the outer integral evaluated numerically.
+float colorCutoutGeneral(float x0l,
+                         float x0r,
+                         float y0,
+                         float yMin,
+                         float yMax,
+                         vec2 radii,
+                         float sigma) {
+    float sum = 0.0;
+    for (float y = yMin; y <= yMax; y += 1.0) {
+        float xEllipsePoint = ellipsePoint(y, y0, radii);
+        sum += gauss(y, sigma) *
+            (erfSigma(x0r + radii.x, sigma) - erfSigma(x0r + xEllipsePoint, sigma) +
+             erfSigma(x0l - xEllipsePoint, sigma) - erfSigma(x0l - radii.x, sigma));
+    }
+    return sum / 2.0;
+}
+
+// The value that needs to be subtracted to accommodate the top border corners.
+float colorCutoutTop(float x0l, float x0r, float y0, vec2 radii, float sigma) {
+    return colorCutoutGeneral(x0l, x0r, y0, y0, y0 + radii.y, radii, sigma);
+}
+
+// The value that needs to be subtracted to accommodate the bottom border corners.
+float colorCutoutBottom(float x0l, float x0r, float y0, vec2 radii, float sigma) {
+    return colorCutoutGeneral(x0l, x0r, y0, y0 - radii.y, y0, radii, sigma);
+}
+
+// The blurred color value for the point at `pos` with the top left corner of the box at
+// `p_{0_"rect"}` and the bottom right corner of the box at `p_{1_"rect"}`.
+float color(vec2 pos, vec2 p0Rect, vec2 p1Rect, vec2 radii, float sigma) {
+    // Compute the vector distances `p_0` and `p_1`.
+    vec2 p0 = p0Rect - pos, p1 = p1Rect - pos;
+
+    // Compute the basic color `"colorFromRect"_sigma(p_0, p_1)`. This is all we have to do if
+    // the box is unrounded.
+    float cRect = colorFromRect(p0, p1, sigma);
+    if (radii.x == 0.0 || radii.y == 0.0)
+        return cRect;
+
+    // Compute the inner corners of the box, taking border radii into account: `x_{0_l}`,
+    // `y_{0_t}`, `x_{0_r}`, and `y_{0_b}`.
+    float x0l = p0.x + radii.x;
+    float y0t = p1.y - radii.y;
+    float x0r = p1.x - radii.x;
+    float y0b = p0.y + radii.y;
+
+    // Compute the final color:
+    //
+    //     "colorFromRect"_sigma(p_0, p_1) -
+    //          ("colorCutoutTop"_sigma(x_{0_l}, x_{0_r}, y_{0_t}, a, b) +
+    //           "colorCutoutBottom"_sigma(x_{0_l}, x_{0_r}, y_{0_b}, a, b))
+    float cCutoutTop = colorCutoutTop(x0l, x0r, y0t, radii, sigma);
+    float cCutoutBottom = colorCutoutBottom(x0l, x0r, y0b, radii, sigma);
+    return cRect - (cCutoutTop + cCutoutBottom);
+}
+
+void main(void) {
+    vec2 pos = vPos.xy;
+    vec2 p0Rect = vBoxShadowRect.xy, p1Rect = vBoxShadowRect.zw;
+    vec2 radii = vBorderRadii.xy;
+    float sigma = vBlurRadius / 2.0;
+    float value = color(pos, p0Rect, p1Rect, radii, sigma);
+
+    value = max(value, 0.0);
+    oFragColor = vec4(1.0, 1.0, 1.0, vInverted == 1.0 ? 1.0 - value : value);
+}

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_box_shadow.glsl
@@ -0,0 +1,10 @@
+#line 1
+/* 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/. */
+
+varying vec2 vPos;
+flat varying vec2 vBorderRadii;
+flat varying float vBlurRadius;
+flat varying vec4 vBoxShadowRect;
+flat varying float vInverted;

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_box_shadow.vs.glsl
@@ -0,0 +1,31 @@
+#line 1
+/* 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/. */
+
+void main(void) {
+    CachePrimitiveInstance cpi = fetch_cache_instance();
+    RenderTaskData task = fetch_render_task(cpi.render_task_index);
+    BoxShadow bs = fetch_boxshadow(cpi.specific_prim_index);
+
+    vec2 p0 = task.data0.xy;
+    vec2 p1 = p0 + task.data0.zw;
+
+    vec2 pos = mix(p0, p1, aPosition.xy);
+
+    vBorderRadii = bs.border_radius_edge_size_blur_radius_inverted.xx;
+    vBlurRadius = bs.border_radius_edge_size_blur_radius_inverted.z;
+    vInverted = bs.border_radius_edge_size_blur_radius_inverted.w;
+    vBoxShadowRect = vec4(bs.bs_rect.xy, bs.bs_rect.xy + bs.bs_rect.zw);
+
+    // The fragment shader expects logical units, beginning at where the
+    // blur radius begins.
+    // The first path of the equation gets the virtual position in
+    // logical pixels within the patch rectangle (accounting for
+    // bilinear offset). Then we add the start position of the
+    // box shadow rect and subtract the blur radius to get the
+    // virtual coordinates that the FS expects.
+    vPos = (pos - 1.0 - p0) / uDevicePixelRatio + bs.bs_rect.xy - vec2(2.0 * vBlurRadius);
+
+    gl_Position = uTransform * vec4(pos, 0.0, 1.0);
+}

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_clip_image.fs.glsl
@@ -0,0 +1,16 @@
+/* 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/. */
+
+void main(void) {
+    float alpha = 1.f;
+    vec2 local_pos = init_transform_fs(vPos, vLocalRect, alpha);
+
+    bool repeat_mask = false; //TODO
+    vec2 clamped_mask_uv = repeat_mask ? fract(vClipMaskUv.xy) :
+        clamp(vClipMaskUv.xy, vec2(0.0, 0.0), vec2(1.0, 1.0));
+    vec2 source_uv = clamped_mask_uv * vClipMaskUvRect.zw + vClipMaskUvRect.xy;
+    float clip_alpha = texture(sMask, source_uv).r; //careful: texture has type A8
+
+    oFragColor = vec4(min(alpha, clip_alpha), 1.0, 1.0, 1.0);
+}

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_clip_image.glsl
@@ -0,0 +1,9 @@
+#line 1
+
+/* 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/. */
+
+varying vec3 vPos;
+flat varying vec4 vLocalRect;
+flat varying vec4 vClipMaskUvRect;

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_clip_image.vs.glsl
@@ -0,0 +1,39 @@
+#line 1
+/* 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/. */
+
+struct ImageMaskData {
+    vec4 uv_rect;
+    vec4 local_rect;
+};
+
+ImageMaskData fetch_mask_data(int index) {
+    ImageMaskData info;
+
+    ivec2 uv = get_fetch_uv_2(index);
+
+    info.uv_rect = texelFetchOffset(sData32, uv, 0, ivec2(0, 0));
+    info.local_rect = texelFetchOffset(sData32, uv, 0, ivec2(1, 0));
+
+    return info;
+}
+
+void main(void) {
+    CacheClipInstance cci = fetch_clip_item(gl_InstanceID);
+    ClipArea area = fetch_clip_area(cci.render_task_index);
+    Layer layer = fetch_layer(cci.layer_index);
+    ImageMaskData mask = fetch_mask_data(cci.data_index);
+    vec4 local_rect = mask.local_rect;
+
+    TransformVertexInfo vi = write_clip_tile_vertex(local_rect,
+                                                    layer,
+                                                    area,
+                                                    cci.segment_index);
+    vLocalRect = vi.clipped_local_rect;
+    vPos = vi.local_pos;
+
+    vClipMaskUv = vec3((vPos.xy / vPos.z - local_rect.xy) / local_rect.zw, 0.0);
+    vec2 texture_size = vec2(textureSize(sMask, 0));
+    vClipMaskUvRect = mask.uv_rect / texture_size.xyxy;
+}

new file mode 100644
--- /dev/null
+++ b/gfx/webrender/res/cs_clip_rectangle.fs.glsl
@@ -0,0 +1,44 @@
+/* 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/. */
+
+float rounded_rect(vec2 pos) {
+    vec2 ref_tl = vClipRect.xy + vec2( vClipRadius.x,  vClipRadius.x);
+    vec2 ref_tr = vClipRect.zy + vec2(-vClipRadius.y,  vClipRadius.y);
+    vec2 ref_br = vClipRect.zw + vec2(-vClipRadius.z, -vClipRadius.z);
+    vec2 ref_bl = vClipRect.xw + vec2( vClipRadius.w, -vClipRadius.w);
+
+    float d_tl = distance(pos, ref_tl);
+    float d_tr = distance(pos, ref_tr);
+    float d_br = distance(pos, ref_br);
+    float d_bl = distance(pos, ref_bl);
+
+    float pixels_per_fragment = length(fwidth(pos.xy));
+    float nudge = 0.5 * pixels_per_fragment;
+    vec4 distances = vec4(d_tl, d_tr, d_br, d_bl) - vClipRadius + nudge;
+
+    bvec4 is_out = bvec4(pos.x < ref_tl.x && pos.y < ref_tl.y,
+                         pos.x > ref_tr.x && pos.y < ref_tr.y,
+                         pos.x > ref_br.x && pos.y > ref_br.y,
+                         pos.x < ref_bl.x && pos.y > ref_bl.y);
+
+    float distance_from_border = dot(vec4(is_out),
+                                     max(vec4(0.0, 0.0, 0.0, 0.0), distances));
+
+    // Move the distance back into pixels.
+    distance_from_border /= pixels_per_fragment;
+    // Apply a more gradual fade out to transparent.
+    //distance_from_border -= 0.5;
+
+    return 1.0 - smoothstep(0.0, 1.0, distance_from_border);
+}
+
+
+void main(void) {
+    float alpha = 1.f;
+    vec2 local_pos = init_transform_fs(vPos, vLocalRect, alpha);
+
+    float clip_alpha = rounded_rect(local_pos);
+
+    oFragColor = vec4(min(alpha, clip_alpha), 0.0, 0.0, 1.0);
+}