diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/extensions/test/xpcshell/test_bug541420.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/extensions/test/xpcshell/test_bug541420.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* 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/.
+ */
+
+function run_test() {
+  do_test_pending();
+  createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1", "1");
+
+  startupManager();
+
+  installAllFiles([do_get_file("data/test_bug541420.xpi")], function() {
+
+    restartManager();
+
+    AddonManager.getAddonByID("bug541420@tests.mozilla.org", function(addon) {
+
+      do_check_neq(addon, null);
+      do_check_true(addon.hasResource("binary"));
+      let uri = addon.getResourceURI("binary");
+      do_check_true(uri instanceof AM_Ci.nsIFileURL);
+      let file = uri.file;
+      do_check_true(file.exists());
+      do_check_true(file.isReadable());
+      do_check_true(file.isWritable());
+
+      // We don't understand executable permissions on Windows since we don't
+      // support NTFS permissions so we don't need to test there. OSX's isExecutable
+      // only tests if the file is an application so it is better to just check the
+      // raw permission bits
+      if (!("nsIWindowsRegKey" in Components.interfaces))
+        do_check_true((file.permissions & 0100) == 0100);
+
+      do_execute_soon(do_test_finished);
+    });
+  });
+}