diff -r 000000000000 -r 6474c204b198 browser/fuel/test/browser_ApplicationQuitting.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/fuel/test/browser_ApplicationQuitting.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+function test() {
+  function quitRequestObserver(aSubject, aTopic, aData) {
+    ok(aTopic == "quit-application-requested" &&
+       aSubject instanceof Components.interfaces.nsISupportsPRBool,
+       "Received a quit request we're going to deny");
+    aSubject.data = true;
+  }
+
+  // ensure that we don't accidentally quit
+  Services.obs.addObserver(quitRequestObserver, "quit-application-requested", false);
+
+  ok(!Application.quit(),    "Tried to quit - and didn't succeed");
+  ok(!Application.restart(), "Tried to restart - and didn't succeed");
+
+  // clean up
+  Services.obs.removeObserver(quitRequestObserver, "quit-application-requested");
+}