hide distracting sites

gistfile1.txt

// ==UserScript==
// @name         Hide emails
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://mail.google.com/mail/u/0/
// @match        *://abc.net.au
// @match        *://facebook.com
// @match        *://www.facebook.com
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const blockerDiv = document.createElement('div');
    blockerDiv.style = `    position: absolute;
    width: 90%;
    height: 40%;
    z-index: 9999999;
    background: white;
    top: 0;
    left: 150px;`;
    blockerDiv.innerHTML = `<h1>Oy you ain't gonna find no joy here. Back to work</h1>`;

    document.body.appendChild(blockerDiv);
    // Your code here...
})();