[BUG] Sandbox Compatibility Issue

[cyfung1031]

Problem Description

// ==UserScript==
// @name         New Userscript
// @namespace    http://tampermonkey.net/
// @version      2026-05-08
// @description  try to take over the world!
// @author       You
// @match        https://*/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        GM_setValue
// ==/UserScript==

(function() {
    'use strict';

    console.log("frames === window", frames === window); // true in TM, false in SC

    // Your code here...
})();

Reproduction Steps

ScriptCat Version

Operating System and Browser Information

Additional Information (Optional)

No response