diff -r 000000000000 -r 6474c204b198 toolkit/components/downloads/test/browser/browser_bug414214.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/downloads/test/browser/browser_bug414214.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,59 @@
+/* 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/. */
+
+function test()
+{
+  try {
+    if (Services.prefs.getBoolPref("browser.download.useJSTransfer")) {
+      return;
+    }
+  } catch (ex) { }
+
+  const PREF_BDM_CLOSEWHENDONE = "browser.download.manager.closeWhenDone";
+  var dm = Cc["@mozilla.org/download-manager;1"].
+           getService(Ci.nsIDownloadManager);
+  var db = dm.DBConnection;
+
+  // First, we clean up the DM
+  db.executeSimpleSQL("DELETE FROM moz_downloads");
+
+  // See if the DM is already open, and if it is, close it!
+  var win = Services.wm.getMostRecentWindow("Download:Manager");
+  if (win)
+    win.close();
+
+  // We need to set browser.download.manager.closeWhenDone to true to test this
+  Services.prefs.setBoolPref(PREF_BDM_CLOSEWHENDONE, true);
+
+  // register a callback to add a load listener to know when the download
+  // manager opens
+  Services.ww.registerNotification(function (aSubject, aTopic, aData) {
+    Services.ww.unregisterNotification(arguments.callee);
+
+    var win = aSubject.QueryInterface(Ci.nsIDOMEventTarget);
+    win.addEventListener("DOMContentLoaded", finishUp, false);
+  });
+
+  // The window doesn't open once we call show, so we need to wait a little bit
+  function finishUp() {
+    var dmui = Cc["@mozilla.org/download-manager-ui;1"].
+               getService(Ci.nsIDownloadManagerUI);
+    ok(dmui.visible, "Download Manager window is open, as expected.");
+
+    // Reset the pref to its default value
+    try {
+      Services.prefs.clearUserPref(PREF_BDM_CLOSEWHENDONE);
+    }
+    catch (err) { }
+
+    finish();
+  }
+  
+  // OK, let's pull up the UI
+  // Linux uses y, everything else is j
+  var key = navigator.platform.match("Linux") ? "y" : "j";
+  EventUtils.synthesizeKey(key, {metaKey: true}, window.opener);
+
+  waitForExplicitFinish();
+}