Redirect www to mbasic when meet facebook com in url for Greasemoney / Tampermonkey

gistfile1.txt

// ==UserScript==
// @name         Redirect to mbasic facebook
// @namespace    https://www.facebook.com/
// @version      0.1
// @description  try to redirect to mbasic facebook
// @author       Zeuxis Lo
// @match        *://www.facebook.com/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    window.location = new URLSearchParams(window.location.search).get("next").replace("www", "mbasic");
})();