diff -r 000000000000 -r 6474c204b198 browser/components/sessionstore/test/browser_645428.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/sessionstore/test/browser_645428.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const NOTIFICATION = "sessionstore-browser-state-restored";
+
+function test() {
+  waitForExplicitFinish();
+
+  function observe(subject, topic, data) {
+    if (NOTIFICATION == topic) {
+      finish();
+      ok(true, "TOPIC received");
+    }
+  }
+
+  Services.obs.addObserver(observe, NOTIFICATION, false);
+  registerCleanupFunction(function () {
+    Services.obs.removeObserver(observe, NOTIFICATION);
+  });
+
+  ss.setBrowserState(JSON.stringify({ windows: [] }));
+}