diff -r 000000000000 -r 6474c204b198 browser/components/preferences/in-content/preferences.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/preferences/in-content/preferences.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,60 @@
+/* - 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";
+ 
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+const Cr = Components.results;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+addEventListener("DOMContentLoaded", function onLoad() {
+  removeEventListener("DOMContentLoaded", onLoad);
+  init_all();
+});
+
+function init_all() {
+  document.documentElement.instantApply = true;
+  gMainPane.init();
+  gPrivacyPane.init();
+  gAdvancedPane.init();
+  gApplicationsPane.init();
+  gContentPane.init();
+  gSyncPane.init();
+  gSecurityPane.init();
+  var initFinished = document.createEvent("Event");
+  initFinished.initEvent("Initialized", true, true);
+  document.dispatchEvent(initFinished);
+
+  let categories = document.getElementById("categories");
+  categories.addEventListener("select", event => gotoPref(event.target.value));
+
+  if (history.length > 1 && history.state) {
+    selectCategory(history.state);
+  } else {
+    history.replaceState("paneGeneral", document.title);
+  }
+}
+
+function selectCategory(name) {
+  let categories = document.getElementById("categories");
+  let item = categories.querySelector(".category[value=" + name + "]");
+  categories.selectedItem = item;
+}
+
+function gotoPref(page) {
+  window.history.replaceState(page, document.title);
+  search(page, "data-category");
+}
+
+function search(aQuery, aAttribute) {
+  let elements = document.getElementById("mainPrefPane").children;
+  for (let element of elements) {
+    let attributeValue = element.getAttribute(aAttribute);
+    element.hidden = (attributeValue != aQuery);
+  }
+}