Userscript bypass check ẩn danh

detectIncognitoBypass.user.js

// ==UserScript==
// @name         Anti incognito mode detection
// @namespace    https://github.com/ElectroHeavenVN/
// @run-at       document-start
// @version      1.0.0
// @description  Bypass detectIncognito on Chromium-based browsers and Firefox
// @author       ElectroHeavenVN
// @updateURL    https://gist.github.com/ElectroHeavenVN/115f4acaf5775af4544185ce02c36502/raw/detectIncognitoBypass.user.js
// @downloadURL  https://gist.github.com/ElectroHeavenVN/115f4acaf5775af4544185ce02c36502/raw/detectIncognitoBypass.user.js
// @include       *://*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function isChrome () {
      const v = navigator.vendor
      return (v !== undefined && v.indexOf('Google') === 0)
    }

    function isFirefox () {
      return (document.documentElement !== undefined && document.documentElement.style.MozAppearance !== undefined)
    }

    function isMSIE () {
      return (navigator.msSaveBlob !== undefined)
    }

    if (isChrome()) {
        navigator.webkitTemporaryStorage.queryUsageAndQuota = function(successCallback, errorCallback) {
            successCallback(0, Number.MAX_SAFE_INTEGER);
        }
    } else if (isFirefox()) {
        if (!navigator.serviceWorker) navigator.serviceWorker = null;
    } else if (isMSIE()) {
        if (!window.indexedDB) window.indexedDB = null;
    }
})();