diff --git a/toolkit/mozapps/downloads/tests/browser/Makefile.in b/toolkit/mozapps/downloads/tests/browser/Makefile.in
index 67681c874326..2e3ca52d575c 100644
--- a/toolkit/mozapps/downloads/tests/browser/Makefile.in
+++ b/toolkit/mozapps/downloads/tests/browser/Makefile.in
@@ -50,6 +50,7 @@ _BROWSER_FILES = \
   browser_bug_411172.js \
   browser_bug_394039.js \
   browser_bug_410289.js \
+  browser_bug_413985.js \
   $(NULL)
 
 ifneq (,$(filter cocoa, $(MOZ_WIDGET_TOOLKIT)))
diff --git a/toolkit/mozapps/downloads/tests/browser/browser_bug_413985.js b/toolkit/mozapps/downloads/tests/browser/browser_bug_413985.js
new file mode 100644
index 000000000000..df24947e3414
--- /dev/null
+++ b/toolkit/mozapps/downloads/tests/browser/browser_bug_413985.js
@@ -0,0 +1,153 @@
+/* ***** 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 mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Mozilla Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2008
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Shawn Wilsher <me@shawnwilsher.com> (Original Author)
+ *
+ * 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 ***** */
+
+function bug413985obs(aWin)
+{
+  this.mWin = aWin;
+  this.wasPaused = false;
+  this.wasResumed = false;
+}
+bug413985obs.prototype = {
+  observe: function(aSubject, aTopic, aData)
+  {
+    if ("timer-callback" == aTopic) {
+      // dispatch a space keypress to resume the download
+      EventUtils.synthesizeKey(" ", {}, this.mWin);
+    }
+  },
+
+  onDownloadStateChange: function(aState, aDownload)
+  {
+    if (aDownload.state == Ci.nsIDownloadManager.DOWNLOAD_DOWNLOADING &&
+        !this.wasPaused) {
+      this.wasPaused = true;
+      // dispatch a space keypress to pause the download
+      EventUtils.synthesizeKey(" ", {}, this.mWin);
+    }
+
+    if (aDownload.state == Ci.nsIDownloadManager.DOWNLOAD_PAUSED &&
+        !this.wasResumed) {
+      this.wasResumed = true;
+      // We have to do this on a timer so other JS stuff that handles the UI
+      // can actually catch up to us...
+      var timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+      timer.init(this, 0, Ci.nsITimer.TYPE_ONE_SHOT);
+    }
+
+    if (aDownload.state == Ci.nsIDownloadManager.DOWNLOAD_FINISHED) {
+      ok(this.wasPaused && this.wasResumed,
+         "The download was paused, and then resumed to completion");
+      aDownload.targetFile.remove(false);
+
+      var dm = Cc["@mozilla.org/download-manager;1"].
+                getService(Ci.nsIDownloadManager);
+      dm.removeListener(this);
+
+      finish();
+    }
+  },
+  onStateChange: function(a, b, c, d, e) { },
+  onProgressChange: function(a, b, c, d, e, f, g) { },
+  onSecurityChange: function(a, b, c, d) { }
+};
+function test()
+{
+  var dm = Cc["@mozilla.org/download-manager;1"].
+           getService(Ci.nsIDownloadManager);
+
+  function addDownload() {
+    function createURI(aObj) {
+      var ios = Cc["@mozilla.org/network/io-service;1"].
+                getService(Ci.nsIIOService);
+      return (aObj instanceof Ci.nsIFile) ? ios.newFileURI(aObj) :
+                                            ios.newURI(aObj, null, null);
+    }
+
+    const nsIWBP = Ci.nsIWebBrowserPersist;
+    var persist = Cc["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"]
+                  .createInstance(Ci.nsIWebBrowserPersist);
+    persist.persistFlags = nsIWBP.PERSIST_FLAGS_REPLACE_EXISTING_FILES |
+                           nsIWBP.PERSIST_FLAGS_BYPASS_CACHE |
+                           nsIWBP.PERSIST_FLAGS_AUTODETECT_APPLY_CONVERSION;
+
+    var dirSvc = Cc["@mozilla.org/file/directory_service;1"].
+                 getService(Ci.nsIProperties);
+    var destFile = dirSvc.get("ProfD", Ci.nsIFile);
+    destFile.append("download.result");
+    if (destFile.exists())
+      destFile.remove(false);
+
+    var dl = dm.addDownload(Ci.nsIDownloadManager.DOWNLOAD_TYPE_DOWNLOAD,
+                            createURI("http://example.com/httpd.js"),
+                            createURI(destFile), null, null,
+                            Math.round(Date.now() * 1000), null, persist);
+
+    persist.progressListener = dl.QueryInterface(Ci.nsIWebProgressListener);
+    persist.saveURI(dl.source, null, null, null, null, dl.targetFile);
+
+    return dl;
+  }
+
+  // First, we clear out the database
+  dm.DBConnection.executeSimpleSQL("DELETE FROM moz_downloads");
+
+  // See if the DM is already open, and if it is, close it!
+  var wm = Cc["@mozilla.org/appshell/window-mediator;1"].
+           getService(Ci.nsIWindowMediator);
+  var win = wm.getMostRecentWindow("Download:Manager");
+  if (win)
+    win.close();
+
+  // OK, now that all the data is in, let's pull up the UI
+  Cc["@mozilla.org/download-manager-ui;1"].
+  getService(Ci.nsIDownloadManagerUI).show();
+
+  // The window doesn't open once we call show, so we need to wait a little bit
+  function finishUp() {
+    var win = wm.getMostRecentWindow("Download:Manager");
+
+    dm.addListener(new bug413985obs(win));
+
+    var dl = addDownload();
+    // we need to focus the download as well
+    var doc = win.document;
+    doc.getElementById("downloadView").selectedIndex = 0;
+  }
+  
+  waitForExplicitFinish();
+  window.setTimeout(finishUp, 500);
+}