diff -r 000000000000 -r 6474c204b198 browser/modules/TabCrashReporter.jsm
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/modules/TabCrashReporter.jsm	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,76 @@
+/* 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/. */
+
+"use strict";
+
+let Cc = Components.classes;
+let Ci = Components.interfaces;
+let Cu = Components.utils;
+
+this.EXPORTED_SYMBOLS = [ "TabCrashReporter" ];
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "CrashSubmit",
+  "resource://gre/modules/CrashSubmit.jsm");
+
+this.TabCrashReporter = {
+  init: function () {
+    if (this.initialized)
+      return;
+    this.initialized = true;
+
+    Services.obs.addObserver(this, "ipc:content-shutdown", false);
+    Services.obs.addObserver(this, "oop-frameloader-crashed", false);
+
+    this.childMap = new Map();
+    this.browserMap = new WeakMap();
+  },
+
+  observe: function (aSubject, aTopic, aData) {
+    switch (aTopic) {
+      case "ipc:content-shutdown":
+        aSubject.QueryInterface(Ci.nsIPropertyBag2);
+
+        if (!aSubject.get("abnormal"))
+          return;
+
+        this.childMap.set(aSubject.get("childID"), aSubject.get("dumpID"));
+        break;
+
+      case "oop-frameloader-crashed":
+        aSubject.QueryInterface(Ci.nsIFrameLoader);
+
+        let browser = aSubject.ownerElement;
+        if (!browser)
+          return;
+
+        this.browserMap.set(browser, aSubject.childID);
+        break;
+    }
+  },
+
+  submitCrashReport: function (aBrowser) {
+    let childID = this.browserMap.get(aBrowser);
+    let dumpID = this.childMap.get(childID);
+    if (!dumpID)
+      return
+
+    if (CrashSubmit.submit(dumpID)) {
+      this.childMap.set(childID, null); // Avoid resubmission.
+    }
+  },
+
+  onAboutTabCrashedLoad: function (aBrowser) {
+    if (!this.childMap)
+      return;
+
+    let dumpID = this.childMap.get(this.browserMap.get(aBrowser));
+    if (!dumpID)
+      return;
+
+    aBrowser.contentDocument.documentElement.classList.add("crashDumpAvaible");
+  }
+}