Bypass Tab Switch Detection

Prevents websites from detecting tab switches by overriding visibility and focus events.

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Wrap lines

// ==UserScript==
// @name         Bypass Tab Switch Detection
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Prevents websites from detecting tab switches by overriding visibility and focus events.
// @author       Devrill
// @match        *://*/*
// @icon         https://i.imgur.com/xePbmM7.png
// @license      MIT
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    window.addEventListener('blur', function(e) {
        e.stopImmediatePropagation();
    }, true);

    window.addEventListener('focus', function(e) {
        e.stopImmediatePropagation();
    }, true);

    document.addEventListener('visibilitychange', function(e) {
        e.stopImmediatePropagation();
    }, true);

    try {
        Object.defineProperty(document, 'hidden', {
            get: function() {
                return false;
            }
        });
    } catch (e) {
        console.log('Failed to override document.hidden:', e);
    }

    try {
        Object.defineProperty(document, 'visibilityState', {
            get: function() {
                return 'visible';
            }
        });
    } catch (e) {
        console.log('Failed to override document.visibilityState:', e);
    }

    var originalAddEventListener = EventTarget.prototype.addEventListener;
    EventTarget.prototype.addEventListener = function(type, listener, options) {
        if (type === 'visibilitychange' || type === 'blur' || type === 'focus') {
            console.log('Blocked event listener for:', type);
            return;
        }
        originalAddEventListener.call(this, type, listener, options);
    };

    console.log('Tab switch detection bypassed!');
})();