Remove WebExtension support from the platform.

- Conditional code
- WE APIs
- WE toolkit theming

1 files changed, 0 insertions, 1050 deletions

diff --git a/toolkit/components/webextensions/ExtensionContent.jsm b/toolkit/components/webextensions/ExtensionContent.jsm
deleted file mode 100644
index 5f9b88f35..000000000
--- a/toolkit/components/webextensions/ExtensionContent.jsm
+++ /dev/null
@@ -1,1050 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use strict";
-
-this.EXPORTED_SYMBOLS = ["ExtensionContent"];
-
-/* globals ExtensionContent */
-
-/*
- * This file handles the content process side of extensions. It mainly
- * takes care of content script injection, content script APIs, and
- * messaging.
- *
- * This file is also the initial entry point for addon processes.
- * ExtensionChild.jsm is responsible for functionality specific to addon
- * processes.
- */
-
-const Ci = Components.interfaces;
-const Cc = Components.classes;
-const Cu = Components.utils;
-const Cr = Components.results;
-
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/AppConstants.jsm");
-
-XPCOMUtils.defineLazyModuleGetter(this, "ExtensionManagement",
-                                  "resource://gre/modules/ExtensionManagement.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "LanguageDetector",
-                                  "resource:///modules/translation/LanguageDetector.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "MatchPattern",
-                                  "resource://gre/modules/MatchPattern.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "MatchGlobs",
-                                  "resource://gre/modules/MatchPattern.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "MessageChannel",
-                                  "resource://gre/modules/MessageChannel.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PromiseUtils",
-                                  "resource://gre/modules/PromiseUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Schemas",
-                                  "resource://gre/modules/Schemas.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "WebNavigationFrames",
-                                  "resource://gre/modules/WebNavigationFrames.jsm");
-
-Cu.import("resource://gre/modules/ExtensionChild.jsm");
-Cu.import("resource://gre/modules/ExtensionCommon.jsm");
-Cu.import("resource://gre/modules/ExtensionUtils.jsm");
-
-const {
-  EventEmitter,
-  LocaleData,
-  defineLazyGetter,
-  flushJarCache,
-  getInnerWindowID,
-  promiseDocumentReady,
-  runSafeSyncWithoutClone,
-} = ExtensionUtils;
-
-const {
-  BaseContext,
-  SchemaAPIManager,
-} = ExtensionCommon;
-
-const {
-  ChildAPIManager,
-  Messenger,
-} = ExtensionChild;
-
-XPCOMUtils.defineLazyGetter(this, "console", ExtensionUtils.getConsole);
-
-const CATEGORY_EXTENSION_SCRIPTS_CONTENT = "webextension-scripts-content";
-
-function isWhenBeforeOrSame(when1, when2) {
-  let table = {"document_start": 0,
-               "document_end": 1,
-               "document_idle": 2};
-  return table[when1] <= table[when2];
-}
-
-var apiManager = new class extends SchemaAPIManager {
-  constructor() {
-    super("content");
-    this.initialized = false;
-  }
-
-  generateAPIs(...args) {
-    if (!this.initialized) {
-      this.initialized = true;
-      for (let [/* name */, value] of XPCOMUtils.enumerateCategoryEntries(CATEGORY_EXTENSION_SCRIPTS_CONTENT)) {
-        this.loadScript(value);
-      }
-    }
-    return super.generateAPIs(...args);
-  }
-
-  registerSchemaAPI(namespace, envType, getAPI) {
-    if (envType == "content_child") {
-      super.registerSchemaAPI(namespace, envType, getAPI);
-    }
-  }
-}();
-
-// Represents a content script.
-function Script(extension, options, deferred = PromiseUtils.defer()) {
-  this.extension = extension;
-  this.options = options;
-  this.run_at = this.options.run_at;
-  this.js = this.options.js || [];
-  this.css = this.options.css || [];
-  this.remove_css = this.options.remove_css;
-  this.match_about_blank = this.options.match_about_blank;
-
-  this.deferred = deferred;
-
-  this.matches_ = new MatchPattern(this.options.matches);
-  this.exclude_matches_ = new MatchPattern(this.options.exclude_matches || null);
-  // TODO: MatchPattern should pre-mangle host-only patterns so that we
-  // don't need to call a separate match function.
-  this.matches_host_ = new MatchPattern(this.options.matchesHost || null);
-  this.include_globs_ = new MatchGlobs(this.options.include_globs);
-  this.exclude_globs_ = new MatchGlobs(this.options.exclude_globs);
-
-  this.requiresCleanup = !this.remove_css && (this.css.length > 0 || options.cssCode);
-}
-
-Script.prototype = {
-  get cssURLs() {
-    // We can handle CSS urls (css) and CSS code (cssCode).
-    let urls = [];
-    for (let url of this.css) {
-      urls.push(this.extension.baseURI.resolve(url));
-    }
-
-    if (this.options.cssCode) {
-      let url = "data:text/css;charset=utf-8," + encodeURIComponent(this.options.cssCode);
-      urls.push(url);
-    }
-
-    return urls;
-  },
-
-  matches(window) {
-    let uri = window.document.documentURIObject;
-    let principal = window.document.nodePrincipal;
-
-    // If mozAddonManager is present on this page, don't allow
-    // content scripts.
-    if (window.navigator.mozAddonManager !== undefined) {
-      return false;
-    }
-
-    if (this.match_about_blank && ["about:blank", "about:srcdoc"].includes(uri.spec)) {
-      // When matching about:blank/srcdoc documents, the checks below
-      // need to be performed against the "owner" document's URI.
-      uri = principal.URI;
-    }
-
-    // Documents from data: URIs also inherit the principal.
-    if (Services.netUtils.URIChainHasFlags(uri, Ci.nsIProtocolHandler.URI_INHERITS_SECURITY_CONTEXT)) {
-      if (!this.match_about_blank) {
-        return false;
-      }
-      uri = principal.URI;
-    }
-
-    if (!(this.matches_.matches(uri) || this.matches_host_.matchesIgnoringPath(uri))) {
-      return false;
-    }
-
-    if (this.exclude_matches_.matches(uri)) {
-      return false;
-    }
-
-    if (this.options.include_globs != null) {
-      if (!this.include_globs_.matches(uri.spec)) {
-        return false;
-      }
-    }
-
-    if (this.exclude_globs_.matches(uri.spec)) {
-      return false;
-    }
-
-    if (this.options.frame_id != null) {
-      if (WebNavigationFrames.getFrameId(window) != this.options.frame_id) {
-        return false;
-      }
-    } else if (!this.options.all_frames && window.top != window) {
-      return false;
-    }
-
-    return true;
-  },
-
-  cleanup(window) {
-    if (!this.remove_css) {
-      let winUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
-                           .getInterface(Ci.nsIDOMWindowUtils);
-
-      for (let url of this.cssURLs) {
-        runSafeSyncWithoutClone(winUtils.removeSheetUsingURIString, url, winUtils.AUTHOR_SHEET);
-      }
-    }
-  },
-
-  /**
-   * Tries to inject this script into the given window and sandbox, if
-   * there are pending operations for the window's current load state.
-   *
-   * @param {Window} window
-   *        The DOM Window to inject the scripts and CSS into.
-   * @param {Sandbox} sandbox
-   *        A Sandbox inheriting from `window` in which to evaluate the
-   *        injected scripts.
-   * @param {function} shouldRun
-   *        A function which, when passed the document load state that a
-   *        script is expected to run at, returns `true` if we should
-   *        currently be injecting scripts for that load state.
-   *
-   *        For initial injection of a script, this function should
-   *        return true if the document is currently in or has already
-   *        passed through the given state. For injections triggered by
-   *        document state changes, it should only return true if the
-   *        given state exactly matches the state that triggered the
-   *        change.
-   * @param {string} when
-   *        The document's current load state, or if triggered by a
-   *        document state change, the new document state that triggered
-   *        the injection.
-   */
-  tryInject(window, sandbox, shouldRun, when) {
-    if (shouldRun("document_start")) {
-      let {cssURLs} = this;
-      if (cssURLs.length > 0) {
-        let winUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
-                             .getInterface(Ci.nsIDOMWindowUtils);
-
-        let method = this.remove_css ? winUtils.removeSheetUsingURIString : winUtils.loadSheetUsingURIString;
-        for (let url of cssURLs) {
-          runSafeSyncWithoutClone(method, url, winUtils.AUTHOR_SHEET);
-        }
-
-        this.deferred.resolve();
-      }
-    }
-
-    let result;
-    let scheduled = this.run_at || "document_idle";
-    if (shouldRun(scheduled)) {
-      for (let [i, url] of this.js.entries()) {
-        let options = {
-          target: sandbox,
-          charset: "UTF-8",
-          // Inject the last script asynchronously unless we're expected to
-          // inject before any page scripts have run, and we haven't already
-          // missed that boat.
-          async: (i === this.js.length - 1) &&
-                 (this.run_at !== "document_start" || when !== "document_start"),
-        };
-        try {
-          result = Services.scriptloader.loadSubScriptWithOptions(url, options);
-        } catch (e) {
-          Cu.reportError(e);
-          this.deferred.reject(e);
-        }
-      }
-
-      if (this.options.jsCode) {
-        try {
-          result = Cu.evalInSandbox(this.options.jsCode, sandbox, "latest");
-        } catch (e) {
-          Cu.reportError(e);
-          this.deferred.reject(e);
-        }
-      }
-
-      this.deferred.resolve(result);
-    }
-  },
-};
-
-function getWindowMessageManager(contentWindow) {
-  let ir = contentWindow.QueryInterface(Ci.nsIInterfaceRequestor)
-                        .getInterface(Ci.nsIDocShell)
-                        .QueryInterface(Ci.nsIInterfaceRequestor);
-  try {
-    return ir.getInterface(Ci.nsIContentFrameMessageManager);
-  } catch (e) {
-    // Some windows don't support this interface (hidden window).
-    return null;
-  }
-}
-
-var DocumentManager;
-var ExtensionManager;
-
-/**
- * An execution context for semi-privileged extension content scripts.
- *
- * This is the child side of the ContentScriptContextParent class
- * defined in ExtensionParent.jsm.
- */
-class ContentScriptContextChild extends BaseContext {
-  constructor(extension, contentWindow, contextOptions = {}) {
-    super("content_child", extension);
-
-    let {isExtensionPage} = contextOptions;
-
-    this.isExtensionPage = isExtensionPage;
-
-    this.setContentWindow(contentWindow);
-
-    let frameId = WebNavigationFrames.getFrameId(contentWindow);
-    this.frameId = frameId;
-
-    this.scripts = [];
-
-    let contentPrincipal = contentWindow.document.nodePrincipal;
-    let ssm = Services.scriptSecurityManager;
-
-    // copy origin attributes from the content window origin attributes to
-    // preserve the user context id. overwrite the addonId.
-    let attrs = contentPrincipal.originAttributes;
-    attrs.addonId = this.extension.id;
-    let extensionPrincipal = ssm.createCodebasePrincipal(this.extension.baseURI, attrs);
-
-    let principal;
-    if (ssm.isSystemPrincipal(contentPrincipal)) {
-      // Make sure we don't hand out the system principal by accident.
-      // also make sure that the null principal has the right origin attributes
-      principal = ssm.createNullPrincipal(attrs);
-    } else {
-      principal = [contentPrincipal, extensionPrincipal];
-    }
-
-    if (isExtensionPage) {
-      if (ExtensionManagement.getAddonIdForWindow(this.contentWindow) != this.extension.id) {
-        throw new Error("Invalid target window for this extension context");
-      }
-      // This is an iframe with content script API enabled and its principal should be the
-      // contentWindow itself. (we create a sandbox with the contentWindow as principal and with X-rays disabled
-      // because it enables us to create the APIs object in this sandbox object and then copying it
-      // into the iframe's window, see Bug 1214658 for rationale)
-      this.sandbox = Cu.Sandbox(contentWindow, {
-        sandboxName: `Web-Accessible Extension Page ${this.extension.id}`,
-        sandboxPrototype: contentWindow,
-        sameZoneAs: contentWindow,
-        wantXrays: false,
-        isWebExtensionContentScript: true,
-      });
-    } else {
-      // This metadata is required by the Developer Tools, in order for
-      // the content script to be associated with both the extension and
-      // the tab holding the content page.
-      let metadata = {
-        "inner-window-id": this.innerWindowID,
-        addonId: attrs.addonId,
-      };
-
-      this.sandbox = Cu.Sandbox(principal, {
-        metadata,
-        sandboxName: `Content Script ${this.extension.id}`,
-        sandboxPrototype: contentWindow,
-        sameZoneAs: contentWindow,
-        wantXrays: true,
-        isWebExtensionContentScript: true,
-        wantExportHelpers: true,
-        wantGlobalProperties: ["XMLHttpRequest", "fetch"],
-        originAttributes: attrs,
-      });
-
-      Cu.evalInSandbox(`
-        window.JSON = JSON;
-        window.XMLHttpRequest = XMLHttpRequest;
-        window.fetch = fetch;
-      `, this.sandbox);
-    }
-
-    Object.defineProperty(this, "principal", {
-      value: Cu.getObjectPrincipal(this.sandbox),
-      enumerable: true,
-      configurable: true,
-    });
-
-    this.url = contentWindow.location.href;
-
-    defineLazyGetter(this, "chromeObj", () => {
-      let chromeObj = Cu.createObjectIn(this.sandbox);
-
-      Schemas.inject(chromeObj, this.childManager);
-      return chromeObj;
-    });
-
-    Schemas.exportLazyGetter(this.sandbox, "browser", () => this.chromeObj);
-    Schemas.exportLazyGetter(this.sandbox, "chrome", () => this.chromeObj);
-
-    // This is an iframe with content script API enabled (bug 1214658)
-    if (isExtensionPage) {
-      Schemas.exportLazyGetter(this.contentWindow,
-                               "browser", () => this.chromeObj);
-      Schemas.exportLazyGetter(this.contentWindow,
-                               "chrome", () => this.chromeObj);
-    }
-  }
-
-  get cloneScope() {
-    return this.sandbox;
-  }
-
-  execute(script, shouldRun, when) {
-    script.tryInject(this.contentWindow, this.sandbox, shouldRun, when);
-  }
-
-  addScript(script, when) {
-    let state = DocumentManager.getWindowState(this.contentWindow);
-    this.execute(script, scheduled => isWhenBeforeOrSame(scheduled, state), when);
-
-    // Save the script in case it has pending operations in later load
-    // states, but only if we're before document_idle, or require cleanup.
-    if (state != "document_idle" || script.requiresCleanup) {
-      this.scripts.push(script);
-    }
-  }
-
-  triggerScripts(documentState) {
-    for (let script of this.scripts) {
-      this.execute(script, scheduled => scheduled == documentState, documentState);
-    }
-    if (documentState == "document_idle") {
-      // Don't bother saving scripts after document_idle.
-      this.scripts = this.scripts.filter(script => script.requiresCleanup);
-    }
-  }
-
-  close() {
-    super.unload();
-
-    if (this.contentWindow) {
-      for (let script of this.scripts) {
-        if (script.requiresCleanup) {
-          script.cleanup(this.contentWindow);
-        }
-      }
-
-      // Overwrite the content script APIs with an empty object if the APIs objects are still
-      // defined in the content window (bug 1214658).
-      if (this.isExtensionPage) {
-        Cu.createObjectIn(this.contentWindow, {defineAs: "browser"});
-        Cu.createObjectIn(this.contentWindow, {defineAs: "chrome"});
-      }
-    }
-    Cu.nukeSandbox(this.sandbox);
-    this.sandbox = null;
-  }
-}
-
-defineLazyGetter(ContentScriptContextChild.prototype, "messenger", function() {
-  // The |sender| parameter is passed directly to the extension.
-  let sender = {id: this.extension.id, frameId: this.frameId, url: this.url};
-  let filter = {extensionId: this.extension.id};
-  let optionalFilter = {frameId: this.frameId};
-
-  return new Messenger(this, [this.messageManager], sender, filter, optionalFilter);
-});
-
-defineLazyGetter(ContentScriptContextChild.prototype, "childManager", function() {
-  let localApis = {};
-  apiManager.generateAPIs(this, localApis);
-
-  let childManager = new ChildAPIManager(this, this.messageManager, localApis, {
-    envType: "content_parent",
-    url: this.url,
-  });
-
-  this.callOnClose(childManager);
-
-  return childManager;
-});
-
-// Responsible for creating ExtensionContexts and injecting content
-// scripts into them when new documents are created.
-DocumentManager = {
-  extensionCount: 0,
-
-  // Map[windowId -> Map[extensionId -> ContentScriptContextChild]]
-  contentScriptWindows: new Map(),
-
-  // Map[windowId -> ContentScriptContextChild]
-  extensionPageWindows: new Map(),
-
-  init() {
-    Services.obs.addObserver(this, "content-document-global-created", false);
-    Services.obs.addObserver(this, "document-element-inserted", false);
-    Services.obs.addObserver(this, "inner-window-destroyed", false);
-  },
-
-  uninit() {
-    Services.obs.removeObserver(this, "content-document-global-created");
-    Services.obs.removeObserver(this, "document-element-inserted");
-    Services.obs.removeObserver(this, "inner-window-destroyed");
-  },
-
-  getWindowState(contentWindow) {
-    let readyState = contentWindow.document.readyState;
-    if (readyState == "complete") {
-      return "document_idle";
-    }
-    if (readyState == "interactive") {
-      return "document_end";
-    }
-    return "document_start";
-  },
-
-  loadInto(window) {
-    // Enable the content script APIs should be available in subframes' window
-    // if it is recognized as a valid addon id (see Bug 1214658 for rationale).
-    const {
-      NO_PRIVILEGES,
-      CONTENTSCRIPT_PRIVILEGES,
-      FULL_PRIVILEGES,
-    } = ExtensionManagement.API_LEVELS;
-    let extensionId = ExtensionManagement.getAddonIdForWindow(window);
-    let apiLevel = ExtensionManagement.getAPILevelForWindow(window, extensionId);
-
-    if (apiLevel != NO_PRIVILEGES) {
-      let extension = ExtensionManager.get(extensionId);
-      if (extension) {
-        if (apiLevel == CONTENTSCRIPT_PRIVILEGES) {
-          DocumentManager.getExtensionPageContext(extension, window);
-        } else if (apiLevel == FULL_PRIVILEGES) {
-          ExtensionChild.createExtensionContext(extension, window);
-        }
-      }
-    }
-  },
-
-  observe: function(subject, topic, data) {
-    // For some types of documents (about:blank), we only see the first
-    // notification, for others (data: URIs) we only observe the second.
-    if (topic == "content-document-global-created" || topic == "document-element-inserted") {
-      let document = subject;
-      let window = document && document.defaultView;
-
-      if (topic == "content-document-global-created") {
-        window = subject;
-        document = window && window.document;
-      }
-
-      if (!document || !document.location || !window) {
-        return;
-      }
-
-      // Make sure we only load into frames that ExtensionContent.init
-      // was called on (i.e., not frames for social or sidebars).
-      let mm = getWindowMessageManager(window);
-      if (!mm || !ExtensionContent.globals.has(mm)) {
-        return;
-      }
-
-      // Load on document-element-inserted, except for about:blank which doesn't
-      // see it, and needs special late handling on DOMContentLoaded event.
-      if (topic === "document-element-inserted") {
-        this.loadInto(window);
-        this.trigger("document_start", window);
-      }
-
-      /* eslint-disable mozilla/balanced-listeners */
-      window.addEventListener("DOMContentLoaded", this, true);
-      window.addEventListener("load", this, true);
-      /* eslint-enable mozilla/balanced-listeners */
-    } else if (topic == "inner-window-destroyed") {
-      let windowId = subject.QueryInterface(Ci.nsISupportsPRUint64).data;
-
-      MessageChannel.abortResponses({innerWindowID: windowId});
-
-      // Close any existent content-script context for the destroyed window.
-      if (this.contentScriptWindows.has(windowId)) {
-        let extensions = this.contentScriptWindows.get(windowId);
-        for (let [, context] of extensions) {
-          context.close();
-        }
-
-        this.contentScriptWindows.delete(windowId);
-      }
-
-      // Close any existent iframe extension page context for the destroyed window.
-      if (this.extensionPageWindows.has(windowId)) {
-        let context = this.extensionPageWindows.get(windowId);
-        context.close();
-        this.extensionPageWindows.delete(windowId);
-      }
-
-      ExtensionChild.destroyExtensionContext(windowId);
-    }
-  },
-
-  handleEvent: function(event) {
-    let window = event.currentTarget;
-    if (event.target != window.document) {
-      // We use capturing listeners so we have precedence over content script
-      // listeners, but only care about events targeted to the element we're
-      // listening on.
-      return;
-    }
-    window.removeEventListener(event.type, this, true);
-
-    // Need to check if we're still on the right page? Greasemonkey does this.
-
-    if (event.type == "DOMContentLoaded") {
-      // By this time, we can be sure if this is an explicit about:blank
-      // document, and if it needs special late loading and fake trigger.
-      if (window.location.href === "about:blank") {
-        this.loadInto(window);
-        this.trigger("document_start", window);
-      }
-      this.trigger("document_end", window);
-    } else if (event.type == "load") {
-      this.trigger("document_idle", window);
-    }
-  },
-
-  // Used to executeScript, insertCSS and removeCSS.
-  executeScript(global, extensionId, options) {
-    let extension = ExtensionManager.get(extensionId);
-
-    let executeInWin = (window) => {
-      let deferred = PromiseUtils.defer();
-      let script = new Script(extension, options, deferred);
-
-      if (script.matches(window)) {
-        let context = this.getContentScriptContext(extension, window);
-        context.addScript(script);
-        return deferred.promise;
-      }
-      return null;
-    };
-
-    let promises = Array.from(this.enumerateWindows(global.docShell), executeInWin)
-                        .filter(promise => promise);
-
-    if (!promises.length) {
-      let details = {};
-      for (let key of ["all_frames", "frame_id", "matches_about_blank", "matchesHost"]) {
-        if (key in options) {
-          details[key] = options[key];
-        }
-      }
-
-      return Promise.reject({message: `No window matching ${JSON.stringify(details)}`});
-    }
-    if (!options.all_frames && promises.length > 1) {
-      return Promise.reject({message: `Internal error: Script matched multiple windows`});
-    }
-    return Promise.all(promises);
-  },
-
-  enumerateWindows: function* (docShell) {
-    let window = docShell.QueryInterface(Ci.nsIInterfaceRequestor)
-                         .getInterface(Ci.nsIDOMWindow);
-    yield window;
-
-    for (let i = 0; i < docShell.childCount; i++) {
-      let child = docShell.getChildAt(i).QueryInterface(Ci.nsIDocShell);
-      yield* this.enumerateWindows(child);
-    }
-  },
-
-  getContentScriptGlobalsForWindow(window) {
-    let winId = getInnerWindowID(window);
-    let extensions = this.contentScriptWindows.get(winId);
-
-    if (extensions) {
-      return Array.from(extensions.values(), ctx => ctx.sandbox);
-    }
-
-    return [];
-  },
-
-  getContentScriptContext(extension, window) {
-    let winId = getInnerWindowID(window);
-    if (!this.contentScriptWindows.has(winId)) {
-      this.contentScriptWindows.set(winId, new Map());
-    }
-
-    let extensions = this.contentScriptWindows.get(winId);
-    if (!extensions.has(extension.id)) {
-      let context = new ContentScriptContextChild(extension, window);
-      extensions.set(extension.id, context);
-    }
-
-    return extensions.get(extension.id);
-  },
-
-  getExtensionPageContext(extension, window) {
-    let winId = getInnerWindowID(window);
-
-    let context = this.extensionPageWindows.get(winId);
-    if (!context) {
-      let context = new ContentScriptContextChild(extension, window, {isExtensionPage: true});
-      this.extensionPageWindows.set(winId, context);
-    }
-
-    return context;
-  },
-
-  startupExtension(extensionId) {
-    if (this.extensionCount == 0) {
-      this.init();
-    }
-    this.extensionCount++;
-
-    let extension = ExtensionManager.get(extensionId);
-    for (let global of ExtensionContent.globals.keys()) {
-      // Note that we miss windows in the bfcache here. In theory we
-      // could execute content scripts on a pageshow event for that
-      // window, but that seems extreme.
-      for (let window of this.enumerateWindows(global.docShell)) {
-        for (let script of extension.scripts) {
-          if (script.matches(window)) {
-            let context = this.getContentScriptContext(extension, window);
-            context.addScript(script);
-          }
-        }
-      }
-    }
-  },
-
-  shutdownExtension(extensionId) {
-    // Clean up content-script contexts on extension shutdown.
-    for (let [, extensions] of this.contentScriptWindows) {
-      let context = extensions.get(extensionId);
-      if (context) {
-        context.close();
-        extensions.delete(extensionId);
-      }
-    }
-
-    // Clean up iframe extension page contexts on extension shutdown.
-    for (let [winId, context] of this.extensionPageWindows) {
-      if (context.extension.id == extensionId) {
-        context.close();
-        this.extensionPageWindows.delete(winId);
-      }
-    }
-
-    ExtensionChild.shutdownExtension(extensionId);
-
-    MessageChannel.abortResponses({extensionId});
-
-    this.extensionCount--;
-    if (this.extensionCount == 0) {
-      this.uninit();
-    }
-  },
-
-  trigger(when, window) {
-    if (when === "document_start") {
-      for (let extension of ExtensionManager.extensions.values()) {
-        for (let script of extension.scripts) {
-          if (script.matches(window)) {
-            let context = this.getContentScriptContext(extension, window);
-            context.addScript(script, when);
-          }
-        }
-      }
-    } else {
-      let contexts = this.contentScriptWindows.get(getInnerWindowID(window)) || new Map();
-      for (let context of contexts.values()) {
-        context.triggerScripts(when);
-      }
-    }
-  },
-};
-
-// Represents a browser extension in the content process.
-class BrowserExtensionContent extends EventEmitter {
-  constructor(data) {
-    super();
-
-    this.id = data.id;
-    this.uuid = data.uuid;
-    this.data = data;
-    this.instanceId = data.instanceId;
-
-    this.MESSAGE_EMIT_EVENT = `Extension:EmitEvent:${this.instanceId}`;
-    Services.cpmm.addMessageListener(this.MESSAGE_EMIT_EVENT, this);
-
-    this.scripts = data.content_scripts.map(scriptData => new Script(this, scriptData));
-    this.webAccessibleResources = new MatchGlobs(data.webAccessibleResources);
-    this.whiteListedHosts = new MatchPattern(data.whiteListedHosts);
-    this.permissions = data.permissions;
-    this.principal = data.principal;
-
-    this.localeData = new LocaleData(data.localeData);
-
-    this.manifest = data.manifest;
-    this.baseURI = Services.io.newURI(data.baseURL, null, null);
-
-    // Only used in addon processes.
-    this.views = new Set();
-
-    let uri = Services.io.newURI(data.resourceURL, null, null);
-
-    if (Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT) {
-      // Extension.jsm takes care of this in the parent.
-      ExtensionManagement.startupExtension(this.uuid, uri, this);
-    }
-  }
-
-  shutdown() {
-    Services.cpmm.removeMessageListener(this.MESSAGE_EMIT_EVENT, this);
-
-    if (Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT) {
-      ExtensionManagement.shutdownExtension(this.uuid);
-    }
-  }
-
-  emit(event, ...args) {
-    Services.cpmm.sendAsyncMessage(this.MESSAGE_EMIT_EVENT, {event, args});
-
-    super.emit(event, ...args);
-  }
-
-  receiveMessage({name, data}) {
-    if (name === this.MESSAGE_EMIT_EVENT) {
-      super.emit(data.event, ...data.args);
-    }
-  }
-
-  localizeMessage(...args) {
-    return this.localeData.localizeMessage(...args);
-  }
-
-  localize(...args) {
-    return this.localeData.localize(...args);
-  }
-
-  hasPermission(perm) {
-    let match = /^manifest:(.*)/.exec(perm);
-    if (match) {
-      return this.manifest[match[1]] != null;
-    }
-    return this.permissions.has(perm);
-  }
-}
-
-ExtensionManager = {
-  // Map[extensionId, BrowserExtensionContent]
-  extensions: new Map(),
-
-  init() {
-    Schemas.init();
-    ExtensionChild.initOnce();
-
-    Services.cpmm.addMessageListener("Extension:Startup", this);
-    Services.cpmm.addMessageListener("Extension:Shutdown", this);
-    Services.cpmm.addMessageListener("Extension:FlushJarCache", this);
-
-    if (Services.cpmm.initialProcessData && "Extension:Extensions" in Services.cpmm.initialProcessData) {
-      let extensions = Services.cpmm.initialProcessData["Extension:Extensions"];
-      for (let data of extensions) {
-        this.extensions.set(data.id, new BrowserExtensionContent(data));
-        DocumentManager.startupExtension(data.id);
-      }
-    }
-  },
-
-  get(extensionId) {
-    return this.extensions.get(extensionId);
-  },
-
-  receiveMessage({name, data}) {
-    let extension;
-    switch (name) {
-      case "Extension:Startup": {
-        extension = new BrowserExtensionContent(data);
-
-        this.extensions.set(data.id, extension);
-
-        DocumentManager.startupExtension(data.id);
-
-        Services.cpmm.sendAsyncMessage("Extension:StartupComplete");
-        break;
-      }
-
-      case "Extension:Shutdown": {
-        extension = this.extensions.get(data.id);
-        extension.shutdown();
-
-        DocumentManager.shutdownExtension(data.id);
-
-        this.extensions.delete(data.id);
-        break;
-      }
-
-      case "Extension:FlushJarCache": {
-        let nsIFile = Components.Constructor("@mozilla.org/file/local;1", "nsIFile",
-                                             "initWithPath");
-        let file = new nsIFile(data.path);
-        flushJarCache(file);
-        Services.cpmm.sendAsyncMessage("Extension:FlushJarCacheComplete");
-        break;
-      }
-    }
-  },
-};
-
-class ExtensionGlobal {
-  constructor(global) {
-    this.global = global;
-
-    MessageChannel.addListener(global, "Extension:Capture", this);
-    MessageChannel.addListener(global, "Extension:DetectLanguage", this);
-    MessageChannel.addListener(global, "Extension:Execute", this);
-    MessageChannel.addListener(global, "WebNavigation:GetFrame", this);
-    MessageChannel.addListener(global, "WebNavigation:GetAllFrames", this);
-
-    this.windowId = global.content
-                          .QueryInterface(Ci.nsIInterfaceRequestor)
-                          .getInterface(Ci.nsIDOMWindowUtils)
-                          .outerWindowID;
-
-    global.sendAsyncMessage("Extension:TopWindowID", {windowId: this.windowId});
-  }
-
-  uninit() {
-    this.global.sendAsyncMessage("Extension:RemoveTopWindowID", {windowId: this.windowId});
-  }
-
-  get messageFilterStrict() {
-    return {
-      innerWindowID: getInnerWindowID(this.global.content),
-    };
-  }
-
-  receiveMessage({target, messageName, recipient, data}) {
-    switch (messageName) {
-      case "Extension:Capture":
-        return this.handleExtensionCapture(data.width, data.height, data.options);
-      case "Extension:DetectLanguage":
-        return this.handleDetectLanguage(target);
-      case "Extension:Execute":
-        return this.handleExtensionExecute(target, recipient.extensionId, data.options);
-      case "WebNavigation:GetFrame":
-        return this.handleWebNavigationGetFrame(data.options);
-      case "WebNavigation:GetAllFrames":
-        return this.handleWebNavigationGetAllFrames();
-    }
-  }
-
-  handleExtensionCapture(width, height, options) {
-    let win = this.global.content;
-
-    const XHTML_NS = "http://www.w3.org/1999/xhtml";
-    let canvas = win.document.createElementNS(XHTML_NS, "canvas");
-    canvas.width = width;
-    canvas.height = height;
-    canvas.mozOpaque = true;
-
-    let ctx = canvas.getContext("2d");
-
-    // We need to scale the image to the visible size of the browser,
-    // in order for the result to appear as the user sees it when
-    // settings like full zoom come into play.
-    ctx.scale(canvas.width / win.innerWidth, canvas.height / win.innerHeight);
-
-    ctx.drawWindow(win, win.scrollX, win.scrollY, win.innerWidth, win.innerHeight, "#fff");
-
-    return canvas.toDataURL(`image/${options.format}`, options.quality / 100);
-  }
-
-  handleDetectLanguage(target) {
-    let doc = target.content.document;
-
-    return promiseDocumentReady(doc).then(() => {
-      let elem = doc.documentElement;
-
-      let language = (elem.getAttribute("xml:lang") || elem.getAttribute("lang") ||
-                      doc.contentLanguage || null);
-
-      // We only want the last element of the TLD here.
-      // Only country codes have any effect on the results, but other
-      // values cause no harm.
-      let tld = doc.location.hostname.match(/[a-z]*$/)[0];
-
-      // The CLD2 library used by the language detector is capable of
-      // analyzing raw HTML. Unfortunately, that takes much more memory,
-      // and since it's hosted by emscripten, and therefore can't shrink
-      // its heap after it's grown, it has a performance cost.
-      // So we send plain text instead.
-      let encoder = Cc["@mozilla.org/layout/documentEncoder;1?type=text/plain"].createInstance(Ci.nsIDocumentEncoder);
-      encoder.init(doc, "text/plain", encoder.SkipInvisibleContent);
-      let text = encoder.encodeToStringWithMaxLength(60 * 1024);
-
-      let encoding = doc.characterSet;
-
-      return LanguageDetector.detectLanguage({language, tld, text, encoding})
-        .then(result => result.language === "un" ? "und" : result.language);
-    });
-  }
-
-  // Used to executeScript, insertCSS and removeCSS.
-  handleExtensionExecute(target, extensionId, options) {
-    return DocumentManager.executeScript(target, extensionId, options).then(result => {
-      try {
-        // Make sure we can structured-clone the result value before
-        // we try to send it back over the message manager.
-        Cu.cloneInto(result, target);
-      } catch (e) {
-        return Promise.reject({message: "Script returned non-structured-clonable data"});
-      }
-      return result;
-    });
-  }
-
-  handleWebNavigationGetFrame({frameId}) {
-    return WebNavigationFrames.getFrame(this.global.docShell, frameId);
-  }
-
-  handleWebNavigationGetAllFrames() {
-    return WebNavigationFrames.getAllFrames(this.global.docShell);
-  }
-}
-
-this.ExtensionContent = {
-  globals: new Map(),
-
-  init(global) {
-    this.globals.set(global, new ExtensionGlobal(global));
-    ExtensionChild.init(global);
-  },
-
-  uninit(global) {
-    ExtensionChild.uninit(global);
-    this.globals.get(global).uninit();
-    this.globals.delete(global);
-  },
-
-  // This helper is exported to be integrated in the devtools RDP actors,
-  // that can use it to retrieve the existent WebExtensions ContentScripts
-  // of a target window and be able to show the ContentScripts source in the
-  // DevTools Debugger panel.
-  getContentScriptGlobalsForWindow(window) {
-    return DocumentManager.getContentScriptGlobalsForWindow(window);
-  },
-};
-
-ExtensionManager.init();