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/. */

 "use strict";

 (function() {

 const {classes: Cc, interfaces: Ci, utils: Cu} = Components;

 let {Services} = Cu.import("resource://gre/modules/Services.jsm", {});

 let nsIFile = Components.Constructor("@mozilla.org/file/local;1", "nsIFile",

                                      "initWithPath");

 const MSG_JAR_FLUSH = "AddonJarFlush";

 try {

   if (Services.appinfo.processType !== Services.appinfo.PROCESS_TYPE_DEFAULT) {

   // Propagate JAR cache flush notifications across process boundaries.

     addMessageListener(MSG_JAR_FLUSH, function jar_flushMessageListener(message) {

       let file = new nsIFile(message.data);

       Services.obs.notifyObservers(file, "flush-cache-entry", null);

     });

   }

 } catch(e) {

   Cu.reportError(e);

 }

 })();