diff -r 000000000000 -r 6474c204b198 toolkit/content/about.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/content/about.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,32 @@
+/* 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/. */
+
+// get release notes and vendor URL from prefs
+var formatter = Components.classes["@mozilla.org/toolkit/URLFormatterService;1"]
+                          .getService(Components.interfaces.nsIURLFormatter);
+var releaseNotesURL = formatter.formatURLPref("app.releaseNotesURL");
+if (releaseNotesURL != "about:blank") {
+  var relnotes = document.getElementById("releaseNotesURL");
+  relnotes.setAttribute("href", releaseNotesURL);
+  relnotes.parentNode.removeAttribute("hidden");
+}
+
+var vendorURL = formatter.formatURLPref("app.vendorURL");
+if (vendorURL != "about:blank") {
+  var vendor = document.getElementById("vendorURL");
+  vendor.setAttribute("href", vendorURL);
+}
+
+// insert the version of the XUL application (!= XULRunner platform version)
+var versionNum = Components.classes["@mozilla.org/xre/app-info;1"]
+                           .getService(Components.interfaces.nsIXULAppInfo)
+                           .version;
+var version = document.getElementById("version");
+version.textContent += " " + versionNum;
+
+// append user agent
+var ua = navigator.userAgent;
+if (ua) {
+  document.getElementById("buildID").textContent += " " + ua;
+}