diff -r 000000000000 -r 6474c204b198 toolkit/components/startup/tests/browser/browser_crash_detection.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/startup/tests/browser/browser_crash_detection.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+/* Any copyright is dedicated to the Public Domain.
+ *    http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+function test() {
+  function checkLastSuccess() {
+    let lastSuccess = Services.prefs.getIntPref("toolkit.startup.last_success");
+    let si = Services.startup.getStartupInfo();
+    is(lastSuccess, parseInt(si["main"].getTime() / 1000, 10),
+       "Startup tracking pref should be set after a delay at the end of startup");
+    finish();
+  }
+
+  if (Services.prefs.getPrefType("toolkit.startup.max_resumed_crashes") == Services.prefs.PREF_INVALID) {
+    info("Skipping this test since startup crash detection is disabled");
+    return;
+  }
+
+  const startupCrashEndDelay = 35 * 1000;
+  waitForExplicitFinish();
+  requestLongerTimeout(2);
+  setTimeout(checkLastSuccess, startupCrashEndDelay);
+}