B2G/gecko/toolkit/mozapps/update/nsUpdateService.js
/**
   * Notified when a timer fires
   * @param   timer
   *          The timer that fired
   */
Notified when a timer fires
@param   timer
The timer that fired
Notified when a timer fires @param timer The timer that fired
function AUS_notify(timer) {
    if (this.isDownloading ||
        this._downloader && this._downloader.patchIsStaged) {
      return;
    }
    this.backgroundChecker.checkForUpdates(this, false);
  }
function AUS_notify ( timer ) { if ( this . isDownloading || this . _downloader && this . _downloader . patchIsStaged ) { return ; } this . backgroundChecker . checkForUpdates ( this , false ) ; }
Notified when a timer fires
 @param   timer
          The timer that fired
Notified when a timer fires @param timer The timer that fired
// If a download is in progress or the patch has been staged do nothing.