diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/extensions/test/xpcshell/test_bug740612.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/extensions/test/xpcshell/test_bug740612.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// This verifies that attempts to override the global values fails but doesn't
+// destroy the world with it
+createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
+
+const profileDir = gProfD.clone();
+profileDir.append("extensions");
+
+function getActiveVersion() {
+  return Services.prefs.getIntPref("bootstraptest.active_version");
+}
+
+function getInstalledVersion() {
+  return Services.prefs.getIntPref("bootstraptest.installed_version");
+}
+
+function run_test() {
+  do_test_pending();
+
+  manuallyInstall(do_get_addon("test_bug740612_1"), profileDir,
+                  "bug740612_1@tests.mozilla.org");
+  manuallyInstall(do_get_addon("test_bug740612_2"), profileDir,
+                  "bug740612_2@tests.mozilla.org");
+
+  startupManager();
+
+  AddonManager.getAddonsByIDs(["bug740612_1@tests.mozilla.org",
+                               "bug740612_2@tests.mozilla.org"],
+                               function([a1, a2]) {
+    do_check_neq(a1, null);
+    do_check_neq(a2, null);
+    do_check_eq(getInstalledVersion(), "1.0");
+    do_check_eq(getActiveVersion(), "1.0");
+
+    do_execute_soon(do_test_finished);
+  });
+}