The Tor Browser / file revision

 registerManifests([do_get_file("data/test_crlf.manifest")]);

 function run_test()

 {

   let cr = Cc["@mozilla.org/chrome/chrome-registry;1"].

     getService(Ci.nsIChromeRegistry);

   let ios = Cc["@mozilla.org/network/io-service;1"].

     getService(Ci.nsIIOService);

   let sourceURI = ios.newURI("chrome://test_crlf/content/", null, null);

   // this throws for packages that are not registered

   let file = cr.convertChromeURL(sourceURI).QueryInterface(Ci.nsIFileURL).file;

   do_check_true(file.equals(do_get_file("data/test_crlf.xul", true)));

 }