The Tor Browser / file revision

 /* 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/. */

 var Ci = Components.interfaces;

 var Cc = Components.classes;

 function Quitter() {

 }

 Quitter.prototype = {

   toString: function() { return "[Quitter]"; },

   quit: function() {

     sendSyncMessage('Quitter.Quit', {});

   },

   __exposedProps__: {

     'toString': 'r',

     'quit': 'r'

   }

 };

 // This is a frame script, so it may be running in a content process.

 // In any event, it is targeted at a specific "tab", so we listen for

 // the DOMWindowCreated event to be notified about content windows

 // being created in this context.

 function QuitterManager() {

   addEventListener("DOMWindowCreated", this, false);

 }

 QuitterManager.prototype = {

   handleEvent: function handleEvent(aEvent) {

     var window = aEvent.target.defaultView;

     window.wrappedJSObject.Quitter = new Quitter(window);

   }

 };

 var quittermanager = new QuitterManager();