diff -r 000000000000 -r 6474c204b198 b2g/components/B2GAboutRedirector.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/b2g/components/B2GAboutRedirector.js	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/. */
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+function debug(msg) {
+  //dump("B2GAboutRedirector: " + msg + "\n");
+}
+
+function netErrorURL() {
+  let uri = "app://system.gaiamobile.org/net_error.html";
+  try {
+    uri = Services.prefs.getCharPref("b2g.neterror.url");
+  } catch(e) {}
+  return uri;
+}
+
+let modules = {
+  certerror: {
+    uri: "chrome://b2g/content/aboutCertError.xhtml",
+    privileged: false,
+    hide: true
+  },
+  neterror: {
+    uri: netErrorURL(),
+    privileged: false,
+    hide: true
+  }
+};
+
+function B2GAboutRedirector() {}
+B2GAboutRedirector.prototype = {
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIAboutModule]),
+  classID: Components.ID("{920400b1-cf8f-4760-a9c4-441417b15134}"),
+
+  _getModuleInfo: function (aURI) {
+    let moduleName = aURI.path.replace(/[?#].*/, "").toLowerCase();
+    return modules[moduleName];
+  },
+
+  // nsIAboutModule
+  getURIFlags: function(aURI) {
+    let flags;
+    let moduleInfo = this._getModuleInfo(aURI);
+    if (moduleInfo.hide)
+      flags = Ci.nsIAboutModule.HIDE_FROM_ABOUTABOUT;
+
+    return flags | Ci.nsIAboutModule.ALLOW_SCRIPT;
+  },
+
+  newChannel: function(aURI) {
+    let moduleInfo = this._getModuleInfo(aURI);
+
+    var ios = Cc["@mozilla.org/network/io-service;1"].
+              getService(Ci.nsIIOService);
+
+    var channel = ios.newChannel(moduleInfo.uri, null, null);
+
+    if (!moduleInfo.privileged) {
+      // Setting the owner to null means that we'll go through the normal
+      // path in GetChannelPrincipal and create a codebase principal based
+      // on the channel's originalURI
+      channel.owner = null;
+    }
+
+    channel.originalURI = aURI;
+
+    return channel;
+  }
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([B2GAboutRedirector]);