GitHub-full-width.tampermonkey.js

// ==UserScript==
// @name         GitHub full-width
// @namespace    http://github.com/
// @version      0.1
// @description  Allows you to view GitHub in full-width
// @author       Alesandro Ortiz (hello@alesandroortiz.com)
// @match        https://github.com/*
// @grant        none
// ==/UserScript==

// From https://somethingididnotknow.wordpress.com/2013/07/01/change-page-styles-with-greasemonkeytampermonkey/
var head, style;
head = document.getElementsByTagName('head')[0];

if (!head) { return; }
style = document.createElement('style');
style.type = 'text/css';
style.innerHTML = '.container { transition:width 1.5s; width: 90% !important; } .repository-with-sidebar .repository-content { width: 97% !important; }';
head.appendChild(style);