Disable WebGL on all pages (modified)

This script will disable WebGL on all sites (but with few site exceptions included to make online games work properly)

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Disable WebGL on all pages (modified)
// @version      2025.10.08
// @description  This script will disable WebGL on all sites (but with few site exceptions included to make online games work properly)
// @author       Joey_JTS
// @license MIT
// @include      http://*
// @include      https://*
// @exclude      *://agar.io
// @exclude      *://classic.minecraft.net
// @exclude      *://crazygames.com
// @exclude      *://diep.io
// @exclude      *://newgrounds.com
// @exclude      *://ruffle.rs
// @exclude      *://scratch.mit.edu
// @exclude      *://slither.io
// @exclude      *://turbowarp.org
// @namespace    https://greasyfork.org/en/users/761382
// @unwrap
// @run-at       document-idle
// @unwrap
// @grant        none
// ==/UserScript==

(function () {
  "use strict";

  const originalGetContext = HTMLCanvasElement.prototype.getContext;
  HTMLCanvasElement.prototype.getContext = function (contextType) {
    if (contextType === "webgl" || contextType === "webgl2") {
      console.log("WebGL is disabled by Tampermonkey");
      return null;
    }
    return originalGetContext.apply(this, arguments);
  };
})();