title: How to handle downloading in GeckoFX 29
body: <p>How can I handle downloading in <strong>GeckoFx</strong> I'm using version <strong>29</strong>
  I've found some ways like adding event of<br>
  <code>LauncherDialog_Download(object sender, LauncherDialogEvent e)</code>
  But, I'm not able to <strong>add handler</strong> for this event </p>
  
  <p>I tried this for handler</p>
  
  <pre><code>LauncherDialogFactory.Register();
  LauncherDialog.Download += LauncherDialog_Download;
  </code></pre>
  
  <p>But, it is showing as error, how can i add handler<br>
  and is there any other ways to handle downloading in <strong>GeckoFx 29</strong>?</p>