This userscript prevent you from quitting the xbox playing accidently

confirm to exit game.userscript.js

// ==UserScript==
// @name         Confirm to exit game
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  This userscript prevent you from quitting the xbox playing accidently
// @author       TheEpicFace
// @match        https://www.xbox.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=xbox.com
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    // run the script if on cloud gaming website
    if (location.toString().includes("/play")){
        window.onbeforeunload = function(){
            return "test"
        }
    }
    // Your code here...
})();