Remove webextensions conditional code from Basilisk.

Tag issue #936

1 files changed, 0 insertions, 1239 deletions

diff --git a/application/basilisk/components/webextensions/ext-utils.js b/application/basilisk/components/webextensions/ext-utils.js
deleted file mode 100644
index 75b2f4bd4..000000000
--- a/application/basilisk/components/webextensions/ext-utils.js
+++ /dev/null
@@ -1,1239 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-XPCOMUtils.defineLazyModuleGetter(this, "CustomizableUI",
-                                  "resource:///modules/CustomizableUI.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "NetUtil",
-                                  "resource://gre/modules/NetUtil.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
-                                  "resource://gre/modules/PrivateBrowsingUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Task",
-                                  "resource://gre/modules/Task.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "setTimeout",
-                                  "resource://gre/modules/Timer.jsm");
-
-XPCOMUtils.defineLazyServiceGetter(this, "styleSheetService",
-                                   "@mozilla.org/content/style-sheet-service;1",
-                                   "nsIStyleSheetService");
-
-Cu.import("resource://gre/modules/ExtensionUtils.jsm");
-Cu.import("resource://gre/modules/AppConstants.jsm");
-
-const POPUP_LOAD_TIMEOUT_MS = 200;
-
-const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
-
-var {
-  DefaultWeakMap,
-  EventManager,
-  promiseEvent,
-} = ExtensionUtils;
-
-// This file provides some useful code for the |tabs| and |windows|
-// modules. All of the code is installed on |global|, which is a scope
-// shared among the different ext-*.js scripts.
-
-global.makeWidgetId = id => {
-  id = id.toLowerCase();
-  // FIXME: This allows for collisions.
-  return id.replace(/[^a-z0-9_-]/g, "_");
-};
-
-function promisePopupShown(popup) {
-  return new Promise(resolve => {
-    if (popup.state == "open") {
-      resolve();
-    } else {
-      popup.addEventListener("popupshown", function onPopupShown(event) {
-        popup.removeEventListener("popupshown", onPopupShown);
-        resolve();
-      });
-    }
-  });
-}
-
-XPCOMUtils.defineLazyGetter(this, "popupStylesheets", () => {
-  let stylesheets = ["chrome://browser/content/extension.css"];
-
-  if (AppConstants.platform === "macosx") {
-    stylesheets.push("chrome://browser/content/extension-mac.css");
-  }
-  return stylesheets;
-});
-
-XPCOMUtils.defineLazyGetter(this, "standaloneStylesheets", () => {
-  let stylesheets = [];
-
-  if (AppConstants.platform === "macosx") {
-    stylesheets.push("chrome://browser/content/extension-mac-panel.css");
-  }
-  if (AppConstants.platform === "win") {
-    stylesheets.push("chrome://browser/content/extension-win-panel.css");
-  }
-  return stylesheets;
-});
-
-class BasePopup {
-  constructor(extension, viewNode, popupURL, browserStyle, fixedWidth = false) {
-    this.extension = extension;
-    this.popupURL = popupURL;
-    this.viewNode = viewNode;
-    this.browserStyle = browserStyle;
-    this.window = viewNode.ownerGlobal;
-    this.destroyed = false;
-    this.fixedWidth = fixedWidth;
-
-    extension.callOnClose(this);
-
-    this.contentReady = new Promise(resolve => {
-      this._resolveContentReady = resolve;
-    });
-
-    this.viewNode.addEventListener(this.DESTROY_EVENT, this);
-
-    let doc = viewNode.ownerDocument;
-    let arrowContent = doc.getAnonymousElementByAttribute(this.panel, "class", "panel-arrowcontent");
-    this.borderColor = doc.defaultView.getComputedStyle(arrowContent).borderTopColor;
-
-    this.browser = null;
-    this.browserLoaded = new Promise((resolve, reject) => {
-      this.browserLoadedDeferred = {resolve, reject};
-    });
-    this.browserReady = this.createBrowser(viewNode, popupURL);
-
-    BasePopup.instances.get(this.window).set(extension, this);
-  }
-
-  static for(extension, window) {
-    return BasePopup.instances.get(window).get(extension);
-  }
-
-  close() {
-    this.closePopup();
-  }
-
-  destroy() {
-    this.extension.forgetOnClose(this);
-
-    this.destroyed = true;
-    this.browserLoadedDeferred.reject(new Error("Popup destroyed"));
-    return this.browserReady.then(() => {
-      this.destroyBrowser(this.browser);
-      this.browser.remove();
-
-      this.viewNode.removeEventListener(this.DESTROY_EVENT, this);
-      this.viewNode.style.maxHeight = "";
-
-      if (this.panel) {
-        this.panel.style.removeProperty("--arrowpanel-background");
-        this.panel.style.removeProperty("--panel-arrow-image-vertical");
-      }
-
-      BasePopup.instances.get(this.window).delete(this.extension);
-
-      this.browser = null;
-      this.viewNode = null;
-    });
-  }
-
-  destroyBrowser(browser) {
-    let mm = browser.messageManager;
-    // If the browser has already been removed from the document, because the
-    // popup was closed externally, there will be no message manager here.
-    if (mm) {
-      mm.removeMessageListener("DOMTitleChanged", this);
-      mm.removeMessageListener("Extension:BrowserBackgroundChanged", this);
-      mm.removeMessageListener("Extension:BrowserContentLoaded", this);
-      mm.removeMessageListener("Extension:BrowserResized", this);
-      mm.removeMessageListener("Extension:DOMWindowClose", this);
-    }
-  }
-
-  // Returns the name of the event fired on `viewNode` when the popup is being
-  // destroyed. This must be implemented by every subclass.
-  get DESTROY_EVENT() {
-    throw new Error("Not implemented");
-  }
-
-  get STYLESHEETS() {
-    let sheets = [];
-
-    if (this.browserStyle) {
-      sheets.push(...popupStylesheets);
-    }
-    if (!this.fixedWidth) {
-      sheets.push(...standaloneStylesheets);
-    }
-
-    return sheets;
-  }
-
-  get panel() {
-    let panel = this.viewNode;
-    while (panel && panel.localName != "panel") {
-      panel = panel.parentNode;
-    }
-    return panel;
-  }
-
-  receiveMessage({name, data}) {
-    switch (name) {
-      case "DOMTitleChanged":
-        this.viewNode.setAttribute("aria-label", this.browser.contentTitle);
-        break;
-
-      case "Extension:BrowserBackgroundChanged":
-        this.setBackground(data.background);
-        break;
-
-      case "Extension:BrowserContentLoaded":
-        this.browserLoadedDeferred.resolve();
-        break;
-
-      case "Extension:BrowserResized":
-        this._resolveContentReady();
-        if (this.ignoreResizes) {
-          this.dimensions = data;
-        } else {
-          this.resizeBrowser(data);
-        }
-        break;
-
-      case "Extension:DOMWindowClose":
-        this.closePopup();
-        break;
-    }
-  }
-
-  handleEvent(event) {
-    switch (event.type) {
-      case this.DESTROY_EVENT:
-        this.destroy();
-        break;
-    }
-  }
-
-  createBrowser(viewNode, popupURL = null) {
-    let document = viewNode.ownerDocument;
-    this.browser = document.createElementNS(XUL_NS, "browser");
-    this.browser.setAttribute("type", "content");
-    this.browser.setAttribute("disableglobalhistory", "true");
-    this.browser.setAttribute("transparent", "true");
-    this.browser.setAttribute("class", "webextension-popup-browser");
-    this.browser.setAttribute("tooltip", "aHTMLTooltip");
-
-    // We only need flex sizing for the sake of the slide-in sub-views of the
-    // main menu panel, so that the browser occupies the full width of the view,
-    // and also takes up any extra height that's available to it.
-    this.browser.setAttribute("flex", "1");
-
-    // Note: When using noautohide panels, the popup manager will add width and
-    // height attributes to the panel, breaking our resize code, if the browser
-    // starts out smaller than 30px by 10px. This isn't an issue now, but it
-    // will be if and when we popup debugging.
-
-    viewNode.appendChild(this.browser);
-
-    extensions.emit("extension-browser-inserted", this.browser);
-    let windowId = WindowManager.getId(this.browser.ownerGlobal);
-    this.browser.messageManager.sendAsyncMessage("Extension:InitExtensionView", {
-      viewType: "popup",
-      windowId,
-    });
-    // TODO(robwu): Rework this to use the Extension:ExtensionViewLoaded message
-    // to detect loads and so on. And definitely move this content logic inside
-    // a file in the child process.
-
-    let initBrowser = browser => {
-      let mm = browser.messageManager;
-      mm.addMessageListener("DOMTitleChanged", this);
-      mm.addMessageListener("Extension:BrowserBackgroundChanged", this);
-      mm.addMessageListener("Extension:BrowserContentLoaded", this);
-      mm.addMessageListener("Extension:BrowserResized", this);
-      mm.addMessageListener("Extension:DOMWindowClose", this, true);
-    };
-
-    if (!popupURL) {
-      initBrowser(this.browser);
-      return this.browser;
-    }
-
-    return promiseEvent(this.browser, "load").then(() => {
-      initBrowser(this.browser);
-
-      let mm = this.browser.messageManager;
-
-      mm.loadFrameScript(
-        "chrome://extensions/content/ext-browser-content.js", false);
-
-      mm.sendAsyncMessage("Extension:InitBrowser", {
-        allowScriptsToClose: true,
-        fixedWidth: this.fixedWidth,
-        maxWidth: 800,
-        maxHeight: 600,
-        stylesheets: this.STYLESHEETS,
-      });
-
-      this.browser.setAttribute("src", popupURL);
-    });
-  }
-
-  resizeBrowser({width, height, detail}) {
-    if (this.fixedWidth) {
-      // Figure out how much extra space we have on the side of the panel
-      // opposite the arrow.
-      let side = this.panel.getAttribute("side") == "top" ? "bottom" : "top";
-      let maxHeight = this.viewHeight + this.extraHeight[side];
-
-      height = Math.min(height, maxHeight);
-      this.browser.style.height = `${height}px`;
-
-      // Set a maximum height on the <panelview> element to our preferred
-      // maximum height, so that the PanelUI resizing code can make an accurate
-      // calculation. If we don't do this, the flex sizing logic will prevent us
-      // from ever reporting a preferred size smaller than the height currently
-      // available to us in the panel.
-      height = Math.max(height, this.viewHeight);
-      this.viewNode.style.maxHeight = `${height}px`;
-    } else {
-      this.browser.style.width = `${width}px`;
-      this.browser.style.height = `${height}px`;
-    }
-
-    let event = new this.window.CustomEvent("WebExtPopupResized", {detail});
-    this.browser.dispatchEvent(event);
-  }
-
-  setBackground(background) {
-    let panelBackground = "";
-    let panelArrow = "";
-
-    if (background) {
-      let borderColor = this.borderColor || background;
-
-      panelBackground = background;
-      panelArrow = `url("data:image/svg+xml,${encodeURIComponent(`<?xml version="1.0" encoding="UTF-8"?>
-        <svg xmlns="http://www.w3.org/2000/svg" width="20" height="10">
-          <path d="M 0,10 L 10,0 20,10 z" fill="${borderColor}"/>
-          <path d="M 1,10 L 10,1 19,10 z" fill="${background}"/>
-        </svg>
-      `)}")`;
-    }
-
-    this.panel.style.setProperty("--arrowpanel-background", panelBackground);
-    this.panel.style.setProperty("--panel-arrow-image-vertical", panelArrow);
-    this.background = background;
-  }
-}
-
-/**
- * A map of active popups for a given browser window.
- *
- * WeakMap[window -> WeakMap[Extension -> BasePopup]]
- */
-BasePopup.instances = new DefaultWeakMap(() => new WeakMap());
-
-class PanelPopup extends BasePopup {
-  constructor(extension, imageNode, popupURL, browserStyle) {
-    let document = imageNode.ownerDocument;
-
-    let panel = document.createElement("panel");
-    panel.setAttribute("id", makeWidgetId(extension.id) + "-panel");
-    panel.setAttribute("class", "browser-extension-panel");
-    panel.setAttribute("tabspecific", "true");
-    panel.setAttribute("type", "arrow");
-    panel.setAttribute("role", "group");
-
-    document.getElementById("mainPopupSet").appendChild(panel);
-
-    super(extension, panel, popupURL, browserStyle);
-
-    this.contentReady.then(() => {
-      panel.openPopup(imageNode, "bottomcenter topright", 0, 0, false, false);
-
-      let event = new this.window.CustomEvent("WebExtPopupLoaded", {
-        bubbles: true,
-        detail: {extension},
-      });
-      this.browser.dispatchEvent(event);
-    });
-  }
-
-  get DESTROY_EVENT() {
-    return "popuphidden";
-  }
-
-  destroy() {
-    super.destroy();
-    this.viewNode.remove();
-  }
-
-  closePopup() {
-    promisePopupShown(this.viewNode).then(() => {
-      // Make sure we're not already destroyed.
-      if (this.viewNode) {
-        this.viewNode.hidePopup();
-      }
-    });
-  }
-}
-
-class ViewPopup extends BasePopup {
-  constructor(extension, window, popupURL, browserStyle, fixedWidth) {
-    let document = window.document;
-
-    // Create a temporary panel to hold the browser while it pre-loads its
-    // content. This panel will never be shown, but the browser's docShell will
-    // be swapped with the browser in the real panel when it's ready.
-    let panel = document.createElement("panel");
-    panel.setAttribute("type", "arrow");
-    document.getElementById("mainPopupSet").appendChild(panel);
-
-    super(extension, panel, popupURL, browserStyle, fixedWidth);
-
-    this.ignoreResizes = true;
-
-    this.attached = false;
-    this.tempPanel = panel;
-
-    this.browser.classList.add("webextension-preload-browser");
-  }
-
-  /**
-   * Attaches the pre-loaded browser to the given view node, and reserves a
-   * promise which resolves when the browser is ready.
-   *
-   * @param {Element} viewNode
-   *        The node to attach the browser to.
-   * @returns {Promise<boolean>}
-   *        Resolves when the browser is ready. Resolves to `false` if the
-   *        browser was destroyed before it was fully loaded, and the popup
-   *        should be closed, or `true` otherwise.
-   */
-  attach(viewNode) {
-    return Task.spawn(function* () {
-      this.viewNode = viewNode;
-      this.viewNode.addEventListener(this.DESTROY_EVENT, this);
-
-      // Wait until the browser element is fully initialized, and give it at least
-      // a short grace period to finish loading its initial content, if necessary.
-      //
-      // In practice, the browser that was created by the mousdown handler should
-      // nearly always be ready by this point.
-      yield Promise.all([
-        this.browserReady,
-        Promise.race([
-          // This promise may be rejected if the popup calls window.close()
-          // before it has fully loaded.
-          this.browserLoaded.catch(() => {}),
-          new Promise(resolve => setTimeout(resolve, POPUP_LOAD_TIMEOUT_MS)),
-        ]),
-      ]);
-
-      if (!this.destroyed && !this.panel) {
-        this.destroy();
-      }
-
-      if (this.destroyed) {
-        return false;
-      }
-
-      this.attached = true;
-
-      // Store the initial height of the view, so that we never resize menu panel
-      // sub-views smaller than the initial height of the menu.
-      this.viewHeight = this.viewNode.boxObject.height;
-
-      // Calculate the extra height available on the screen above and below the
-      // menu panel. Use that to calculate the how much the sub-view may grow.
-      let popupRect = this.panel.getBoundingClientRect();
-
-      this.setBackground(this.background);
-
-      let win = this.window;
-      let popupBottom = win.mozInnerScreenY + popupRect.bottom;
-      let popupTop = win.mozInnerScreenY + popupRect.top;
-
-      let screenBottom = win.screen.availTop + win.screen.availHeight;
-      this.extraHeight = {
-        bottom: Math.max(0, screenBottom - popupBottom),
-        top:  Math.max(0, popupTop - win.screen.availTop),
-      };
-
-      // Create a new browser in the real popup.
-      let browser = this.browser;
-      this.createBrowser(this.viewNode);
-
-      this.browser.swapDocShells(browser);
-      this.destroyBrowser(browser);
-
-      this.ignoreResizes = false;
-      if (this.dimensions) {
-        this.resizeBrowser(this.dimensions);
-      }
-
-      this.tempPanel.remove();
-      this.tempPanel = null;
-
-      let event = new this.window.CustomEvent("WebExtPopupLoaded", {
-        bubbles: true,
-        detail: {extension: this.extension},
-      });
-      this.browser.dispatchEvent(event);
-
-      return true;
-    }.bind(this));
-  }
-
-  destroy() {
-    return super.destroy().then(() => {
-      if (this.tempPanel) {
-        this.tempPanel.remove();
-        this.tempPanel = null;
-      }
-    });
-  }
-
-  get DESTROY_EVENT() {
-    return "ViewHiding";
-  }
-
-  closePopup() {
-    if (this.attached) {
-      CustomizableUI.hidePanelForNode(this.viewNode);
-    } else {
-      this.destroy();
-    }
-  }
-}
-
-Object.assign(global, {PanelPopup, ViewPopup});
-
-// Manages tab-specific context data, and dispatching tab select events
-// across all windows.
-global.TabContext = function TabContext(getDefaults, extension) {
-  this.extension = extension;
-  this.getDefaults = getDefaults;
-
-  this.tabData = new WeakMap();
-  this.lastLocation = new WeakMap();
-
-  AllWindowEvents.addListener("progress", this);
-  AllWindowEvents.addListener("TabSelect", this);
-
-  EventEmitter.decorate(this);
-};
-
-TabContext.prototype = {
-  get(tab) {
-    if (!this.tabData.has(tab)) {
-      this.tabData.set(tab, this.getDefaults(tab));
-    }
-
-    return this.tabData.get(tab);
-  },
-
-  clear(tab) {
-    this.tabData.delete(tab);
-  },
-
-  handleEvent(event) {
-    if (event.type == "TabSelect") {
-      let tab = event.target;
-      this.emit("tab-select", tab);
-      this.emit("location-change", tab);
-    }
-  },
-
-  onStateChange(browser, webProgress, request, stateFlags, statusCode) {
-    let flags = Ci.nsIWebProgressListener;
-
-    if (!(~stateFlags & (flags.STATE_IS_WINDOW | flags.STATE_START) ||
-          this.lastLocation.has(browser))) {
-      this.lastLocation.set(browser, request.URI);
-    }
-  },
-
-  onLocationChange(browser, webProgress, request, locationURI, flags) {
-    let gBrowser = browser.ownerGlobal.gBrowser;
-    let lastLocation = this.lastLocation.get(browser);
-    if (browser === gBrowser.selectedBrowser &&
-        !(lastLocation && lastLocation.equalsExceptRef(browser.currentURI))) {
-      let tab = gBrowser.getTabForBrowser(browser);
-      this.emit("location-change", tab, true);
-    }
-    this.lastLocation.set(browser, browser.currentURI);
-  },
-
-  shutdown() {
-    AllWindowEvents.removeListener("progress", this);
-    AllWindowEvents.removeListener("TabSelect", this);
-  },
-};
-
-// Manages tab mappings and permissions for a specific extension.
-function ExtensionTabManager(extension) {
-  this.extension = extension;
-
-  // A mapping of tab objects to the inner window ID the extension currently has
-  // the active tab permission for. The active permission for a given tab is
-  // valid only for the inner window that was active when the permission was
-  // granted. If the tab navigates, the inner window ID changes, and the
-  // permission automatically becomes stale.
-  //
-  // WeakMap[tab => inner-window-id<int>]
-  this.hasTabPermissionFor = new WeakMap();
-}
-
-ExtensionTabManager.prototype = {
-  addActiveTabPermission(tab = TabManager.activeTab) {
-    if (this.extension.hasPermission("activeTab")) {
-      // Note that, unlike Chrome, we don't currently clear this permission with
-      // the tab navigates. If the inner window is revived from BFCache before
-      // we've granted this permission to a new inner window, the extension
-      // maintains its permissions for it.
-      this.hasTabPermissionFor.set(tab, tab.linkedBrowser.innerWindowID);
-    }
-  },
-
-  revokeActiveTabPermission(tab = TabManager.activeTab) {
-    this.hasTabPermissionFor.delete(tab);
-  },
-
-  // Returns true if the extension has the "activeTab" permission for this tab.
-  // This is somewhat more permissive than the generic "tabs" permission, as
-  // checked by |hasTabPermission|, in that it also allows programmatic script
-  // injection without an explicit host permission.
-  hasActiveTabPermission(tab) {
-    // This check is redundant with addTabPermission, but cheap.
-    if (this.extension.hasPermission("activeTab")) {
-      return (this.hasTabPermissionFor.has(tab) &&
-              this.hasTabPermissionFor.get(tab) === tab.linkedBrowser.innerWindowID);
-    }
-    return false;
-  },
-
-  hasTabPermission(tab) {
-    return this.extension.hasPermission("tabs") || this.hasActiveTabPermission(tab);
-  },
-
-  convert(tab) {
-    let window = tab.ownerGlobal;
-    let browser = tab.linkedBrowser;
-
-    let mutedInfo = {muted: tab.muted};
-    if (tab.muteReason === null) {
-      mutedInfo.reason = "user";
-    } else if (tab.muteReason) {
-      mutedInfo.reason = "extension";
-      mutedInfo.extensionId = tab.muteReason;
-    }
-
-    let result = {
-      id: TabManager.getId(tab),
-      index: tab._tPos,
-      windowId: WindowManager.getId(window),
-      selected: tab.selected,
-      highlighted: tab.selected,
-      active: tab.selected,
-      pinned: tab.pinned,
-      status: TabManager.getStatus(tab),
-      incognito: WindowManager.isBrowserPrivate(browser),
-      width: browser.frameLoader.lazyWidth || browser.clientWidth,
-      height: browser.frameLoader.lazyHeight || browser.clientHeight,
-      audible: tab.soundPlaying,
-      mutedInfo,
-    };
-    if (this.extension.hasPermission("cookies")) {
-      result.cookieStoreId = getCookieStoreIdForTab(result, tab);
-    }
-
-    if (this.hasTabPermission(tab)) {
-      result.url = browser.currentURI.spec;
-      let title = browser.contentTitle || tab.label;
-      if (title) {
-        result.title = title;
-      }
-      let icon = window.gBrowser.getIcon(tab);
-      if (icon) {
-        result.favIconUrl = icon;
-      }
-    }
-
-    return result;
-  },
-
-  // Converts tabs returned from SessionStore.getClosedTabData and
-  // SessionStore.getClosedWindowData into API tab objects
-  convertFromSessionStoreClosedData(tab, window) {
-    let result = {
-      sessionId: String(tab.closedId),
-      index: tab.pos ? tab.pos : 0,
-      windowId: WindowManager.getId(window),
-      selected: false,
-      highlighted: false,
-      active: false,
-      pinned: false,
-      incognito: Boolean(tab.state && tab.state.isPrivate),
-    };
-
-    if (this.hasTabPermission(tab)) {
-      let entries = tab.state ? tab.state.entries : tab.entries;
-      result.url = entries[0].url;
-      result.title = entries[0].title;
-      if (tab.image) {
-        result.favIconUrl = tab.image;
-      }
-    }
-
-    return result;
-  },
-
-  getTabs(window) {
-    return Array.from(window.gBrowser.tabs)
-                .filter(tab => !tab.closing)
-                .map(tab => this.convert(tab));
-  },
-};
-
-// Sends the tab and windowId upon request. This is primarily used to support
-// the synchronous `browser.extension.getViews` API.
-let onGetTabAndWindowId = {
-  receiveMessage({name, target, sync}) {
-    let {gBrowser} = target.ownerGlobal;
-    let tab = gBrowser && gBrowser.getTabForBrowser(target);
-    if (tab) {
-      let reply = {
-        tabId: TabManager.getId(tab),
-        windowId: WindowManager.getId(tab.ownerGlobal),
-      };
-      if (sync) {
-        return reply;
-      }
-      target.messageManager.sendAsyncMessage("Extension:SetTabAndWindowId", reply);
-    }
-  },
-};
-/* eslint-disable mozilla/balanced-listeners */
-Services.mm.addMessageListener("Extension:GetTabAndWindowId", onGetTabAndWindowId);
-/* eslint-enable mozilla/balanced-listeners */
-
-
-// Manages global mappings between XUL tabs and extension tab IDs.
-global.TabManager = {
-  _tabs: new WeakMap(),
-  _nextId: 1,
-  _initialized: false,
-
-  // We begin listening for TabOpen and TabClose events once we've started
-  // assigning IDs to tabs, so that we can remap the IDs of tabs which are moved
-  // between windows.
-  initListener() {
-    if (this._initialized) {
-      return;
-    }
-
-    AllWindowEvents.addListener("TabOpen", this);
-    AllWindowEvents.addListener("TabClose", this);
-    WindowListManager.addOpenListener(this.handleWindowOpen.bind(this));
-
-    this._initialized = true;
-  },
-
-  handleEvent(event) {
-    if (event.type == "TabOpen") {
-      let {adoptedTab} = event.detail;
-      if (adoptedTab) {
-        // This tab is being created to adopt a tab from a different window.
-        // Copy the ID from the old tab to the new.
-        let tab = event.target;
-        this._tabs.set(tab, this.getId(adoptedTab));
-
-        tab.linkedBrowser.messageManager.sendAsyncMessage("Extension:SetTabAndWindowId", {
-          windowId: WindowManager.getId(tab.ownerGlobal),
-        });
-      }
-    } else if (event.type == "TabClose") {
-      let {adoptedBy} = event.detail;
-      if (adoptedBy) {
-        // This tab is being closed because it was adopted by a new window.
-        // Copy its ID to the new tab, in case it was created as the first tab
-        // of a new window, and did not have an `adoptedTab` detail when it was
-        // opened.
-        this._tabs.set(adoptedBy, this.getId(event.target));
-
-        adoptedBy.linkedBrowser.messageManager.sendAsyncMessage("Extension:SetTabAndWindowId", {
-          windowId: WindowManager.getId(adoptedBy),
-        });
-      }
-    }
-  },
-
-  handleWindowOpen(window) {
-    if (window.arguments && window.arguments[0] instanceof window.XULElement) {
-      // If the first window argument is a XUL element, it means the
-      // window is about to adopt a tab from another window to replace its
-      // initial tab.
-      let adoptedTab = window.arguments[0];
-
-      this._tabs.set(window.gBrowser.tabs[0], this.getId(adoptedTab));
-    }
-  },
-
-  getId(tab) {
-    if (this._tabs.has(tab)) {
-      return this._tabs.get(tab);
-    }
-    this.initListener();
-
-    let id = this._nextId++;
-    this._tabs.set(tab, id);
-    return id;
-  },
-
-  getBrowserId(browser) {
-    let gBrowser = browser.ownerGlobal.gBrowser;
-    // Some non-browser windows have gBrowser but not
-    // getTabForBrowser!
-    if (gBrowser && gBrowser.getTabForBrowser) {
-      let tab = gBrowser.getTabForBrowser(browser);
-      if (tab) {
-        return this.getId(tab);
-      }
-    }
-    return -1;
-  },
-
-  /**
-   * Returns the XUL <tab> element associated with the given tab ID. If no tab
-   * with the given ID exists, and no default value is provided, an error is
-   * raised, belonging to the scope of the given context.
-   *
-   * @param {integer} tabId
-   *        The ID of the tab to retrieve.
-   * @param {ExtensionContext} context
-   *        The context of the caller.
-   *        This value may be omitted if `default_` is not `undefined`.
-   * @param {*} default_
-   *        The value to return if no tab exists with the given ID.
-   * @returns {Element<tab>}
-   *        A XUL <tab> element.
-   */
-  getTab(tabId, context, default_ = undefined) {
-    // FIXME: Speed this up without leaking memory somehow.
-    for (let window of WindowListManager.browserWindows()) {
-      if (!window.gBrowser) {
-        continue;
-      }
-      for (let tab of window.gBrowser.tabs) {
-        if (this.getId(tab) == tabId) {
-          return tab;
-        }
-      }
-    }
-    if (default_ !== undefined) {
-      return default_;
-    }
-    throw new context.cloneScope.Error(`Invalid tab ID: ${tabId}`);
-  },
-
-  get activeTab() {
-    let window = WindowManager.topWindow;
-    if (window && window.gBrowser) {
-      return window.gBrowser.selectedTab;
-    }
-    return null;
-  },
-
-  getStatus(tab) {
-    return tab.getAttribute("busy") == "true" ? "loading" : "complete";
-  },
-
-  convert(extension, tab) {
-    return TabManager.for(extension).convert(tab);
-  },
-};
-
-// WeakMap[Extension -> ExtensionTabManager]
-let tabManagers = new WeakMap();
-
-// Returns the extension-specific tab manager for the given extension, or
-// creates one if it doesn't already exist.
-TabManager.for = function(extension) {
-  if (!tabManagers.has(extension)) {
-    tabManagers.set(extension, new ExtensionTabManager(extension));
-  }
-  return tabManagers.get(extension);
-};
-
-/* eslint-disable mozilla/balanced-listeners */
-extensions.on("shutdown", (type, extension) => {
-  tabManagers.delete(extension);
-});
-/* eslint-enable mozilla/balanced-listeners */
-
-function memoize(fn) {
-  let weakMap = new DefaultWeakMap(fn);
-  return weakMap.get.bind(weakMap);
-}
-
-// Manages mapping between XUL windows and extension window IDs.
-global.WindowManager = {
-  _windows: new WeakMap(),
-  _nextId: 0,
-
-  // Note: These must match the values in windows.json.
-  WINDOW_ID_NONE: -1,
-  WINDOW_ID_CURRENT: -2,
-
-  get topWindow() {
-    return Services.wm.getMostRecentWindow("navigator:browser");
-  },
-
-  windowType(window) {
-    // TODO: Make this work.
-
-    let {chromeFlags} = window.QueryInterface(Ci.nsIInterfaceRequestor)
-                              .getInterface(Ci.nsIDocShell)
-                              .treeOwner.QueryInterface(Ci.nsIInterfaceRequestor)
-                              .getInterface(Ci.nsIXULWindow);
-
-    if (chromeFlags & Ci.nsIWebBrowserChrome.CHROME_OPENAS_DIALOG) {
-      return "popup";
-    }
-
-    return "normal";
-  },
-
-  updateGeometry(window, options) {
-    if (options.left !== null || options.top !== null) {
-      let left = options.left !== null ? options.left : window.screenX;
-      let top = options.top !== null ? options.top : window.screenY;
-      window.moveTo(left, top);
-    }
-
-    if (options.width !== null || options.height !== null) {
-      let width = options.width !== null ? options.width : window.outerWidth;
-      let height = options.height !== null ? options.height : window.outerHeight;
-      window.resizeTo(width, height);
-    }
-  },
-
-  isBrowserPrivate: memoize(browser => {
-    return PrivateBrowsingUtils.isBrowserPrivate(browser);
-  }),
-
-  getId(window) {
-    if (this._windows.has(window)) {
-      return this._windows.get(window);
-    }
-    let id = this._nextId++;
-    this._windows.set(window, id);
-    return id;
-  },
-
-  getWindow(id, context) {
-    if (id == this.WINDOW_ID_CURRENT) {
-      return currentWindow(context);
-    }
-
-    for (let window of WindowListManager.browserWindows(true)) {
-      if (this.getId(window) == id) {
-        return window;
-      }
-    }
-    return null;
-  },
-
-  getState(window) {
-    const STATES = {
-      [window.STATE_MAXIMIZED]: "maximized",
-      [window.STATE_MINIMIZED]: "minimized",
-      [window.STATE_NORMAL]: "normal",
-    };
-    let state = STATES[window.windowState];
-    if (window.fullScreen) {
-      state = "fullscreen";
-    }
-    return state;
-  },
-
-  setState(window, state) {
-    if (state != "fullscreen" && window.fullScreen) {
-      window.fullScreen = false;
-    }
-
-    switch (state) {
-      case "maximized":
-        window.maximize();
-        break;
-
-      case "minimized":
-      case "docked":
-        window.minimize();
-        break;
-
-      case "normal":
-        // Restore sometimes returns the window to its previous state, rather
-        // than to the "normal" state, so it may need to be called anywhere from
-        // zero to two times.
-        window.restore();
-        if (window.windowState != window.STATE_NORMAL) {
-          window.restore();
-        }
-        if (window.windowState != window.STATE_NORMAL) {
-          // And on OS-X, where normal vs. maximized is basically a heuristic,
-          // we need to cheat.
-          window.sizeToContent();
-        }
-        break;
-
-      case "fullscreen":
-        window.fullScreen = true;
-        break;
-
-      default:
-        throw new Error(`Unexpected window state: ${state}`);
-    }
-  },
-
-  convert(extension, window, getInfo) {
-    let xulWindow = window.QueryInterface(Ci.nsIInterfaceRequestor)
-                          .getInterface(Ci.nsIDocShell)
-                          .treeOwner.QueryInterface(Ci.nsIInterfaceRequestor)
-                          .getInterface(Ci.nsIXULWindow);
-
-    let result = {
-      id: this.getId(window),
-      focused: window.document.hasFocus(),
-      top: window.screenY,
-      left: window.screenX,
-      width: window.outerWidth,
-      height: window.outerHeight,
-      incognito: PrivateBrowsingUtils.isWindowPrivate(window),
-      type: this.windowType(window),
-      state: this.getState(window),
-      alwaysOnTop: xulWindow.zLevel >= Ci.nsIXULWindow.raisedZ,
-    };
-
-    if (getInfo && getInfo.populate) {
-      result.tabs = TabManager.for(extension).getTabs(window);
-    }
-
-    return result;
-  },
-
-  // Converts windows returned from SessionStore.getClosedWindowData
-  // into API window objects
-  convertFromSessionStoreClosedData(window, extension) {
-    let result = {
-      sessionId: String(window.closedId),
-      focused: false,
-      incognito: false,
-      type: "normal", // this is always "normal" for a closed window
-      state: this.getState(window),
-      alwaysOnTop: false,
-    };
-
-    if (window.tabs.length) {
-      result.tabs = [];
-      window.tabs.forEach((tab, index) => {
-        result.tabs.push(TabManager.for(extension).convertFromSessionStoreClosedData(tab, window, index));
-      });
-    }
-
-    return result;
-  },
-};
-
-// Manages listeners for window opening and closing. A window is
-// considered open when the "load" event fires on it. A window is
-// closed when a "domwindowclosed" notification fires for it.
-global.WindowListManager = {
-  _openListeners: new Set(),
-  _closeListeners: new Set(),
-
-  // Returns an iterator for all browser windows. Unless |includeIncomplete| is
-  // true, only fully-loaded windows are returned.
-  * browserWindows(includeIncomplete = false) {
-    // The window type parameter is only available once the window's document
-    // element has been created. This means that, when looking for incomplete
-    // browser windows, we need to ignore the type entirely for windows which
-    // haven't finished loading, since we would otherwise skip browser windows
-    // in their early loading stages.
-    // This is particularly important given that the "domwindowcreated" event
-    // fires for browser windows when they're in that in-between state, and just
-    // before we register our own "domwindowcreated" listener.
-
-    let e = Services.wm.getEnumerator("");
-    while (e.hasMoreElements()) {
-      let window = e.getNext();
-
-      let ok = includeIncomplete;
-      if (window.document.readyState == "complete") {
-        ok = window.document.documentElement.getAttribute("windowtype") == "navigator:browser";
-      }
-
-      if (ok) {
-        yield window;
-      }
-    }
-  },
-
-  addOpenListener(listener) {
-    if (this._openListeners.size == 0 && this._closeListeners.size == 0) {
-      Services.ww.registerNotification(this);
-    }
-    this._openListeners.add(listener);
-
-    for (let window of this.browserWindows(true)) {
-      if (window.document.readyState != "complete") {
-        window.addEventListener("load", this);
-      }
-    }
-  },
-
-  removeOpenListener(listener) {
-    this._openListeners.delete(listener);
-    if (this._openListeners.size == 0 && this._closeListeners.size == 0) {
-      Services.ww.unregisterNotification(this);
-    }
-  },
-
-  addCloseListener(listener) {
-    if (this._openListeners.size == 0 && this._closeListeners.size == 0) {
-      Services.ww.registerNotification(this);
-    }
-    this._closeListeners.add(listener);
-  },
-
-  removeCloseListener(listener) {
-    this._closeListeners.delete(listener);
-    if (this._openListeners.size == 0 && this._closeListeners.size == 0) {
-      Services.ww.unregisterNotification(this);
-    }
-  },
-
-  handleEvent(event) {
-    event.currentTarget.removeEventListener(event.type, this);
-    let window = event.target.defaultView;
-    if (window.document.documentElement.getAttribute("windowtype") != "navigator:browser") {
-      return;
-    }
-
-    for (let listener of this._openListeners) {
-      listener(window);
-    }
-  },
-
-  observe(window, topic, data) {
-    if (topic == "domwindowclosed") {
-      if (window.document.documentElement.getAttribute("windowtype") != "navigator:browser") {
-        return;
-      }
-
-      window.removeEventListener("load", this);
-      for (let listener of this._closeListeners) {
-        listener(window);
-      }
-    } else {
-      window.addEventListener("load", this);
-    }
-  },
-};
-
-// Provides a facility to listen for DOM events across all XUL windows.
-global.AllWindowEvents = {
-  _listeners: new Map(),
-
-  // If |type| is a normal event type, invoke |listener| each time
-  // that event fires in any open window. If |type| is "progress", add
-  // a web progress listener that covers all open windows.
-  addListener(type, listener) {
-    if (type == "domwindowopened") {
-      return WindowListManager.addOpenListener(listener);
-    } else if (type == "domwindowclosed") {
-      return WindowListManager.addCloseListener(listener);
-    }
-
-    if (this._listeners.size == 0) {
-      WindowListManager.addOpenListener(this.openListener);
-    }
-
-    if (!this._listeners.has(type)) {
-      this._listeners.set(type, new Set());
-    }
-    let list = this._listeners.get(type);
-    list.add(listener);
-
-    // Register listener on all existing windows.
-    for (let window of WindowListManager.browserWindows()) {
-      this.addWindowListener(window, type, listener);
-    }
-  },
-
-  removeListener(eventType, listener) {
-    if (eventType == "domwindowopened") {
-      return WindowListManager.removeOpenListener(listener);
-    } else if (eventType == "domwindowclosed") {
-      return WindowListManager.removeCloseListener(listener);
-    }
-
-    let listeners = this._listeners.get(eventType);
-    listeners.delete(listener);
-    if (listeners.size == 0) {
-      this._listeners.delete(eventType);
-      if (this._listeners.size == 0) {
-        WindowListManager.removeOpenListener(this.openListener);
-      }
-    }
-
-    // Unregister listener from all existing windows.
-    let useCapture = eventType === "focus" || eventType === "blur";
-    for (let window of WindowListManager.browserWindows()) {
-      if (eventType == "progress") {
-        window.gBrowser.removeTabsProgressListener(listener);
-      } else {
-        window.removeEventListener(eventType, listener, useCapture);
-      }
-    }
-  },
-
-  /* eslint-disable mozilla/balanced-listeners */
-  addWindowListener(window, eventType, listener) {
-    let useCapture = eventType === "focus" || eventType === "blur";
-
-    if (eventType == "progress") {
-      window.gBrowser.addTabsProgressListener(listener);
-    } else {
-      window.addEventListener(eventType, listener, useCapture);
-    }
-  },
-  /* eslint-enable mozilla/balanced-listeners */
-
-  // Runs whenever the "load" event fires for a new window.
-  openListener(window) {
-    for (let [eventType, listeners] of AllWindowEvents._listeners) {
-      for (let listener of listeners) {
-        this.addWindowListener(window, eventType, listener);
-      }
-    }
-  },
-};
-
-AllWindowEvents.openListener = AllWindowEvents.openListener.bind(AllWindowEvents);
-
-// Subclass of EventManager where we just need to call
-// add/removeEventListener on each XUL window.
-global.WindowEventManager = function(context, name, event, listener) {
-  EventManager.call(this, context, name, fire => {
-    let listener2 = (...args) => listener(fire, ...args);
-    AllWindowEvents.addListener(event, listener2);
-    return () => {
-      AllWindowEvents.removeListener(event, listener2);
-    };
-  });
-};
-
-WindowEventManager.prototype = Object.create(EventManager.prototype);