UserScript: VSCode Insiders Install Btn

gistfile1.js

// ==UserScript==
// @name         VSCode Insiders Install Btn
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://marketplace.visualstudio.com/items*
// @grant        none
// ==/UserScript==

(function () {
  'use strict';
  (new MutationObserver(check)).observe(document, {
    childList: true,
    subtree: true
  });

  function check(changes, observer) {
    const install = document.querySelector('#section-banner > div > table > tbody > tr > td.item-header > div > div.ux-item-action > div.installButtonContainer > div > span.ux-oneclick-install-button-container > a')
    if (install) {

      install.setAttribute('href', install.getAttribute('href').replace('vscode', 'vscode-insiders'))

      observer.disconnect();
      // code
    }
  }
})();