nitter-redirect.js

// ==UserScript==
// @name        Redirect to nitter
// @description Automatically redirect from twitter to nitter
// @match       https://mobile.twitter.com/*
// @match       https://twitter.com/*
// @grant       none
// @inject-into content
// @run-at      document-start
// ==/UserScript==

(function () {
    'use strict';
    const instance = 'nitter.net'
    location.hostname = `${instance}`;
})();