function test() { function quitRequestObserver(aSubject, aTopic, aData) { ok(aTopic == "quit-application-requested" && aSubject instanceof Components.interfaces.nsISupportsPRBool, "Received a quit request we're going to deny"); aSubject.data = true; } // ensure that we don't accidentally quit Services.obs.addObserver(quitRequestObserver, "quit-application-requested", false); ok(!Application.quit(), "Tried to quit - and didn't succeed"); ok(!Application.restart(), "Tried to restart - and didn't succeed"); // clean up Services.obs.removeObserver(quitRequestObserver, "quit-application-requested", false); }