Undetectorized

Keeps sites blind to tab switches and window blur. Fully blocks all focus and visibility checks.. like, waay more solid than the standard “Always On Focus” scripts. Btw Shoutout to daijro.
Version vom 21.11.2025. Aktuellste Version
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Wrap lines
// ==UserScript==
// @name          Undetectorized
// @namespace     bypass.focus.fixed
// @version       5.2
// @author        @DoesBadThingsGuy
// @icon          https://i.imgur.com/l8qT82q.jpeg
// @description   Keeps sites blind to tab switches and window blur. Fully blocks all focus and visibility checks.. like, waay more solid than the standard “Always On Focus” scripts. Btw Shoutout to daijro.
// @include       *
// @run-at        document-start
// ==/UserScript==

(function() {
    const uw = unsafeWindow;
    const patch = () => {
        try {
            uw.document.hasFocus = () => true;
            uw.hasFocus = () => true;
            Object.defineProperty(document, "visibilityState", { get: () => "visible" });
            ["hidden","mozHidden","msHidden","webkitHidden"].forEach(p =>
                Object.defineProperty(document, p, { value: false })
            );
            window.onblur = null;
            window.onfocus = null;
            document.onblur = null;
            document.onfocus = null;
            window.focus = () => true;
            document.focus = () => true;
            window.onbeforeunload = null;
            document.onbeforeunload = null;
            Object.defineProperty(window, "onbeforeunload", {
                set: () => true,
                get: () => null
            });
        } catch(e){}
    };

    const blockEvents = () => {
        try {
            const evs = [
                "visibilitychange","webkitvisibilitychange","mozvisibilitychange","msvisibilitychange",
                "blur","focus","focusin","focusout",
                "mouseleave","mouseout","mouseenter","mouseover",
                "pageshow","pagehide","resume","freeze"
            ];
            const handler = e => {
                e.stopImmediatePropagation();
                e.stopPropagation();
                e.preventDefault();
            };
            evs.forEach(ev => {
                window.addEventListener(ev, handler, true);
                document.addEventListener(ev, handler, true);
            });
        } catch(e){}
    };

    const hookAddEvent = () => {
        try {
            const blocked = [
                "visibilitychange","webkitvisibilitychange","mozvisibilitychange","msvisibilitychange",
                "blur","focus","focusin","focusout",
                "mouseleave","mouseout","mouseenter","mouseover",
                "beforeunload",
                "pageshow","pagehide","resume","freeze"
            ];
            const orig = EventTarget.prototype.addEventListener;
            EventTarget.prototype.addEventListener = function(type, listener, opts) {
                if (blocked.includes(type)) return;
                return orig.call(this, type, listener, opts);
            };
        } catch(e){}
    };

    const patchTiming = () => {
        try {
            const base = performance.now();
            performance.now = () => base + Math.random() * 0.01;
            const oRAF = uw.requestAnimationFrame;
            uw.requestAnimationFrame = cb => oRAF(() => cb(performance.now()));
            const oTO = uw.setTimeout;
            uw.setTimeout = (fn, t) => oTO(fn, 0);
        } catch(e){}
    };

    patch();
    blockEvents();
    hookAddEvent();
    patchTiming();

    setInterval(() => {
        patch();
        hookAddEvent();
        patchTiming();
    }, 100);

})();