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Anti-Disable-Devtool

Intercepts scripts from disabling devtools.

  1. // ==UserScript==
  2. // @name         Anti-Disable-Devtool
  3. // @description  Intercepts scripts from disabling devtools.
  4. // @author       Snipcola
  5. // @namespace    https://snipcola.com
  6. // @license      MIT
  7. // @match        *://*/*
  8. // @version      1.0
  9. // @run-at       document-start
  10. // ==/UserScript==
  11.  
  12. const blacklistedHooks = ["contextmenu"];
  13. const blacklistedScripts = ["disabledevtool", "disable-devtool", "disableinspect", "disable-inspect", "blockdevtool", "block-devtool", "blockinspect", "block-inspect"];
  14.  
  15. const name = "Anti-Disable-Devtool";
  16. const originalAddEventListener = document.addEventListener;
  17.  
  18. document.addEventListener = function (type, listener, options) {
  19.     if (blacklistedHooks.includes(type)) console.error(`[${name}] Intercepted event from being hooked:`, { type, listener });
  20.     else originalAddEventListener.call(document, type, listener, options);
  21. };
  22.  
  23. function observe () {
  24.     if (!document.documentElement) {
  25.         setTimeout(observe, 10);
  26.         return;
  27.     }
  28.  
  29.     new MutationObserver((mutations) => {
  30.         mutations.forEach(({ addedNodes }) => {
  31.             addedNodes.forEach((node) => {
  32.                 if (node.nodeType === 1 && node.tagName === "SCRIPT" && blacklistedScripts.map((s) => node.src?.includes(s)).includes(true)) {
  33.                     node.type = "javascript/intercepted";
  34.                     node.remove();
  35.                     console.error(`[${name}] Intercepted script from being executed:`, { node, source: node.src });
  36.                 }
  37.             });
  38.         });
  39.     }).observe(document.documentElement, {
  40.         childList: true,
  41.         subtree: true
  42.     });
  43. }
  44.  
  45. observe();