Disable Anti-DevTool Neutralizer / Anti-devtools blocker / Anti-Devtools remover / Bypasser / Works for Chrome, Firefox, etc.

antidevtool.user.js

// ==UserScript==
// @name         Disable Anti-DevTool Neutralizer
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Disables anti-devtool scripts using multiple techniques for debugging and development purposes.
// @author       UltimateQuack (aak. PatoFlamejanteTV)
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // 1. Remove key event listeners (most anti-devtool scripts use these)
    window.onkeydown = null;
    window.onkeyup = null;
    window.onkeypress = null;
    document.onkeydown = null;
    document.onkeyup = null;
    document.onkeypress = null;

    // 2. Remove context menu blocking
    window.oncontextmenu = null;
    document.oncontextmenu = null;

    // 3. Remove all inline event listeners on body and document
    if (document.body) {
        document.body.onkeydown = null;
        document.body.onkeyup = null;
        document.body.onkeypress = null;
        document.body.oncontextmenu = null;
    }

    // 4. Remove all event listeners by cloning body (advanced)
    if (document.body) {
        var oldBody = document.body;
        var newBody = oldBody.cloneNode(true);
        oldBody.parentNode.replaceChild(newBody, oldBody);
    }

    // 5. Remove scripts by src attribute
    document.querySelectorAll('script[src*="disable-devtool"]').forEach(e => e.remove());

    // 6. Remove inline scripts that reference "devtool" or suspicious keywords
    document.querySelectorAll('script').forEach(script => {
        if (script.innerText.match(/devtool|ondevopen|debugger|console\.profile/gi)) {
            script.remove();
        }
    });

    // 7. Overwrite global functions (if present)
    if (typeof window.disableDevtool === "function") {
        window.disableDevtool = function() {};
    }

    // 8. Overwrite detection callbacks
    if (typeof window.ondevtoolopen === "function") {
        window.ondevtoolopen = function() {};
    }

    // 9. Overwrite console methods (some scripts use these for detection)
    ['profile', 'profileEnd', 'clear', 'log', 'warn', 'info', 'error'].forEach(fn => {
        if (typeof console[fn] === "function") {
            console[fn] = function() {};
        }
    });

    // 10. Patch setInterval and setTimeout to block repeated checks
    const origSetInterval = window.setInterval;
    window.setInterval = function(fn, delay, ...args) {
        if (typeof fn === 'function' && fn.toString().match(/devtool|debugger|console\.profile/gi)) {
            return null;
        }
        return origSetInterval(fn, delay, ...args);
    };
    const origSetTimeout = window.setTimeout;
    window.setTimeout = function(fn, delay, ...args) {
        if (typeof fn === 'function' && fn.toString().match(/devtool|debugger|console\.profile/gi)) {
            return null;
        }
        return origSetTimeout(fn, delay, ...args);
    };

    // 11. Block 'beforeunload' and 'unload' events (sometimes used to reload/redirect)
    window.onbeforeunload = null;
    window.onunload = null;
    window.addEventListener('beforeunload', function(e) {
        e.stopImmediatePropagation();
    }, true);
    window.addEventListener('unload', function(e) {
        e.stopImmediatePropagation();
    }, true);

    // 12. Remove suspicious document event listeners (keydown, contextmenu, etc.)
    const removeAllListeners = (event) => {
        const clone = document.body.cloneNode(true);
        document.body.parentNode.replaceChild(clone, document.body);
    };
    ['keydown', 'keyup', 'keypress', 'contextmenu'].forEach(event => {
        window.addEventListener(event, function(e) {
            e.stopImmediatePropagation();
        }, true);
        document.addEventListener(event, function(e) {
            e.stopImmediatePropagation();
        }, true);
    });

    // 13. Periodically re-apply in case anti-devtool is injected dynamically
    setInterval(() => {
        window.onkeydown = null;
        window.onkeyup = null;
        window.onkeypress = null;
        document.onkeydown = null;
        document.onkeyup = null;
        document.onkeypress = null;
        window.oncontextmenu = null;
        document.oncontextmenu = null;
        if (document.body) {
            document.body.onkeydown = null;
            document.body.onkeyup = null;
            document.body.onkeypress = null;
            document.body.oncontextmenu = null;
        }
    }, 1000);

})();