// ==UserScript==
// @name         userscript-github-close-404
// @namespace    https://github.com/mefengl
// @version      0.0.2
// @description  Auto-closes GitHub repo pages that return a 404 error.
// @author       mefengl
// @match        https://github.com/*/*
// @license      MIT
// @grant        none
// ==/UserScript==
(function () {
'use strict';
var errorImage = document.querySelector('img[alt="404 “This is not the web page you are looking for”"]');
if (errorImage) {
window.close();
}
})();