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/. */

 const Cc = Components.classes;

 const Ci = Components.interfaces;

 const Cu = Components.utils;

 var dirSvc = Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties);

 var profileDir = do_get_profile();

 /**

  * Removes any files that could make our tests fail.

  */

 function cleanUp()

 {

   let files = [

     "downloads.sqlite",

     "places.sqlite",

     "cookies.sqlite",

     "signons.sqlite",

     "permissions.sqlite"

   ];

   for (let i = 0; i < files.length; i++) {

     let file = dirSvc.get("ProfD", Ci.nsIFile);

     file.append(files[i]);

     if (file.exists())

       file.remove(false);

   }

 }

 cleanUp();

 function oldDownloadManagerDisabled()

 {

   try {

     // This method throws an exception if the old Download Manager is disabled.

     Services.downloads.activeDownloadCount;

   } catch (ex) {

     return true;

   }

   return false;

 }