Download Popup wieder automatisch öffnen

(function() {

  if (window.__SSi != 'window0')
    return;

  Downloads.getList(Downloads.ALL)
  .then(list => list.addView(
    { onDownloadAdded: () =>
        Services.wm.getMostRecentBrowserWindow().document.getElementById('downloads-button').click()
    }
  ));

})();