spoofing screen sizes user script

gistfile1.txt

// ==UserScript==
// @name         screen
// @namespace    http://tampermonkey.net/
// @version      2025-01-03
// @description  try to take over the world!
// @author       Arthur Edelstein, Brave
// @match        *://*/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

const n = 16;

// mostly from https://gs.statcounter.com/screen-resolution-stats/desktop/worldwide
const resolutions = [
  [ 360, 800 ], // no
  [ 768, 1024 ], // no
  [ 800, 600 ], // yes
  [ 810, 1080 ], // no
  [ 820, 1180 ], // no
  [ 1024, 768 ], // yes
  [ 1024, 1366 ], // no
  [ 1280, 720 ], // no
  [ 1280, 800 ], // yes
  [ 1280, 1024 ], // yes
  [ 1280, 960 ], // no
  [ 1360, 768 ], // no
  [ 1366, 768 ], // yes
  [ 1440, 900 ], // yes
  [ 1536, 864 ], // yes
  [ 1600, 900 ], // yes
  [ 1680, 1050 ], // yes
  [ 1920, 1080 ], // yes
  [ 1920, 1200 ], // yes
  [ 2560, 1440 ], // yes
  [ 3840, 2160], // no
  [ 3840, 2400], // no
  [ 5120, 2880], // no
];

(function() {
    'use strict';

    console.log("document.readyState:", document.readyState)

  const [w, h] = resolutions[n];

  Object.defineProperties(Screen.prototype, {
      width: {
          value: w
      },
      height: {
          value: h
      },
      availWidth: {
          value: w
      },
      availHeight: {
          value: h
      }
  })


  console.log(`res ${n}: ${screen.width}x${screen.height}`)

  document.addEventListener("DOMContentLoaded", () => {
      const div = document.createElement('div')
      div.style.position = 'fixed'
      div.style.bottom = 0;
      div.style.left = 0;
      div.style.zIndex = 100;
      div.style.border = "1px black solid";
      div.style.padding = "4px";
      div.style.margin = "4px";
      div.style.borderRadius = "4px";
      div.style.backgroundColor = "white";
      div.innerHTML = `${screen.width}x${screen.height}`
      div.style.width = "initial";
      document.body.appendChild(div)
  });

})();