Blocks native fullscreen transitions while emulating a true fullscreen state to websites, and suppresses tab-switch / visibility detection.
// ==UserScript==
// @name CheatTheSystem
// @namespace http://bdstudios.nl
// @version 2025-10-03
// @description Blocks native fullscreen transitions while emulating a true fullscreen state to websites, and suppresses tab-switch / visibility detection.
// @author JTD
// @match *://*/*
// @license MIT
// @icon https://www.google.com/s2/favicons?sz=64&domain=proxyahh1.vercel.app
// @grant none
// ==/UserScript==
// content_script.js
(function () {
'use strict';
function inject(fn) {
const s = document.createElement('script');
s.textContent = '(' + fn.toString() + ')();';
(document.documentElement || document.head || document.body).appendChild(s);
s.remove();
}
inject(function () {
try {
// Fake fullscreen request
Element.prototype.requestFullscreen = function () {
// set fake fullscreen element
document._fakeFullscreenEl = this;
// fire event so sites think it happened
setTimeout(() => {
document.dispatchEvent(new Event("fullscreenchange"));
}, 0);
return Promise.resolve(this);
};
Element.prototype.mozRequestFullScreen = Element.prototype.requestFullscreen;
Element.prototype.webkitRequestFullscreen = Element.prototype.requestFullscreen;
// Fake exitFullscreen
document.exitFullscreen = function () {
document._fakeFullscreenEl = null;
setTimeout(() => {
document.dispatchEvent(new Event("fullscreenchange"));
}, 0);
return Promise.resolve();
};
// Always report a fullscreen element (truthy)
Object.defineProperty(document, 'fullscreenElement', {
get() { return document._fakeFullscreenEl || document.documentElement; },
configurable: true
});
} catch (e) {}
try {
Object.defineProperty(document, 'hidden', {
get() { return false; },
configurable: true
});
Object.defineProperty(document, 'visibilityState', {
get() { return 'visible'; },
configurable: true
});
document.hasFocus = function () { return true; };
window.hasFocus = function () { return true; };
} catch (e) {}
function stopEvent(e) { try { e.stopImmediatePropagation(); } catch (err) {} }
addEventListener('visibilitychange', stopEvent, true);
addEventListener('blur', stopEvent, true);
addEventListener('focus', stopEvent, true);
addEventListener('pageshow', stopEvent, true);
addEventListener('pagehide', stopEvent, true);
const origDocAdd = Document.prototype.addEventListener;
Document.prototype.addEventListener = function (type, listener, opts) {
if (type === 'visibilitychange' || type === 'blur' || type === 'focus') {
return origDocAdd.call(this, type, function () {}, opts);
}
return origDocAdd.call(this, type, listener, opts);
};
});
})();