diff --git a/toolkit/mozapps/downloads/content/downloads.js b/toolkit/mozapps/downloads/content/downloads.js
index a4ee0e7dc808..05d1b72bf48c 100644
--- a/toolkit/mozapps/downloads/content/downloads.js
+++ b/toolkit/mozapps/downloads/content/downloads.js
@@ -504,15 +504,6 @@ let gDownloadObserver = {
         break;
       case "private-browsing":
         if (aData == "enter" || aData == "exit") {
-          // We need to reset the title here, because otherwise the title of
-          // the download manager would still reflect the progress of current
-          // active downloads, if any, after switchiung the private browsing
-          // mode, even though the downloads will no longer be accessible.
-          // If any download is auto-started after switching the private
-          // browsing mode, the title will be updated as needed by the progress
-          // listener.
-          document.title = document.documentElement.getAttribute("statictitle");
-
           // We might get this notification before the download manager
           // service, so the new database connection might not be ready
           // yet.  Defer this until all private-browsing notifications
diff --git a/toolkit/mozapps/downloads/tests/chrome/Makefile.in b/toolkit/mozapps/downloads/tests/chrome/Makefile.in
index cf4431193740..0661b4468a78 100644
--- a/toolkit/mozapps/downloads/tests/chrome/Makefile.in
+++ b/toolkit/mozapps/downloads/tests/chrome/Makefile.in
@@ -62,7 +62,6 @@ _CHROME_FILES = \
   test_search_keys.xul \
   test_select_all.xul \
   test_space_key_pauses_resumes.xul \
-  test_privatebrowsing_title.xul \
   test_ui_stays_open_on_alert_clickback.xul \
   test_unkownContentType_dialog_layout.xul \
   test_bug_412360.xul \
diff --git a/toolkit/mozapps/downloads/tests/chrome/test_privatebrowsing_title.xul b/toolkit/mozapps/downloads/tests/chrome/test_privatebrowsing_title.xul
deleted file mode 100644
index dca24ce6a33b..000000000000
--- a/toolkit/mozapps/downloads/tests/chrome/test_privatebrowsing_title.xul
+++ /dev/null
@@ -1,139 +0,0 @@
-<?xml version="1.0"?>
-<!--
-/* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Download Manager UI Test Code.
- *
- * The Initial Developer of the Original Code is
- * Ehsan Akhgari <ehsan.akhgari@gmail.com>.
- * Portions created by the Initial Developer are Copyright (C) 2009
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
-/**
- * Test bug 464800 to make sure that the download manager window title is
- * properly cleared when transitioning into the private browsing mode.
- */
--->
-
-<window title="Private Browsing transition title change test"
-        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
-        onload="test();">
-
-  <script type="application/javascript"
-          src="chrome://mochikit/content/MochiKit/packed.js"/>
-  <script type="application/javascript"
-          src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
-  <script type="application/javascript"
-          src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
-
-  <script type="application/javascript">
-  <![CDATA[
-
-const Cc = Components.classes;
-const Ci = Components.interfaces;
-const Cr = Components.results;
-
-function test()
-{
-  // The private browsing service might not be available
-  let pbs = null;
-  try {
-    pbs = Cc["@mozilla.org/privatebrowsing;1"].getService(Ci.nsIPrivateBrowsingService);
-  } catch (e) {
-  }
-  if (!pbs)
-    return;
-
-  // We should prevent the private browsing service from changing the current
-  // session on private mode transitions, in order to play nice with the
-  // Mochitest test harness.
-  let prefBranch = Cc["@mozilla.org/preferences-service;1"].
-                   getService(Ci.nsIPrefBranch);
-  prefBranch.setBoolPref("browser.privatebrowsing.keep_current_session", true);
-
-  // Close the UI if necessary
-  let wm = Cc["@mozilla.org/appshell/window-mediator;1"].
-           getService(Ci.nsIWindowMediator);
-  let win = wm.getMostRecentWindow("Download:Manager");
-  if (win) win.close();
-
-  let obs = Cc["@mozilla.org/observer-service;1"].
-            getService(Ci.nsIObserverService);
-  const DLMGR_UI_DONE = "download-manager-ui-done";
-
-  let testObs = {
-    observe: function(aSubject, aTopic, aData) {
-      if (aTopic != DLMGR_UI_DONE)
-        return;
-
-      let win = aSubject.QueryInterface(Ci.nsIDOMWindow);
-      let defaultTitle = win.document.documentElement.getAttribute("statictitle");
-      is(win.document.title, defaultTitle,
-        "The downloads window title is correct outside of the private browsing mode");
-      win.document.title = "some title";
-
-      // Enter the private browsing mode
-      pbs.privateBrowsingEnabled = true;
-
-      is(win.document.title, defaultTitle,
-        "The downloads window title is correct inside the private browsing mode");
-      win.document.title = "another title";
-
-      // Leave the private browsing mode
-      pbs.privateBrowsingEnabled = false;
-
-      is(win.document.title, defaultTitle,
-        "The downloads window title is correct after leaving the private browsing mode");
-
-      // We're done!
-      win.close();
-      obs.removeObserver(testObs, DLMGR_UI_DONE);
-      prefBranch.clearUserPref("browser.privatebrowsing.keep_current_session");
-      SimpleTest.finish();
-    }
-  };
-  obs.addObserver(testObs, DLMGR_UI_DONE, false);
-
-  // Show the Download Manager UI
-  Cc["@mozilla.org/download-manager-ui;1"].
-  getService(Ci.nsIDownloadManagerUI).show();
-
-  SimpleTest.waitForExplicitFinish();
-}
-
-  ]]>
-  </script>
-
-  <body xmlns="http://www.w3.org/1999/xhtml">
-    <p id="display"></p>
-    <div id="content" style="display:none;"></div>
-    <pre id="test"></pre>
-  </body>
-</window>