B2G/gecko/browser/base/content/aboutDialog.js
// true when updating is enabled.
true when updating is enabled.
true when updating is enabled .
get updateEnabled() {
    try {
      return Services.prefs.getBoolPref("app.update.enabled");
    }
    catch (e) { }
    return true; 
  }
get updateEnabled ( ) { try { return Services . prefs . getBoolPref ( "app.update.enabled" ) ; } catch ( e ) { } return true ; }
true when updating is enabled.
true when updating is enabled .
// Firefox default is true