Github Fixed Header TamperMonkey Script

github-fixed-header.user.js

// ==UserScript==
// @name         Github Fixed Header
// @namespace    http://github.com/sherzberg
// @version      0.2
// @description  This script forces the Github header to be fixed. Very useful for long thread or long file viewing.
// @author       Spencer Herzberg
// @match        https://github.com/*
// @grant        none
// ==/UserScript==

$(document).ready(function() {
    var start_of_content = $('#start-of-content');

    start_of_content.after("<div style='height: 50px'></div>");

    var header = $('.header');
    header.css('position', 'fixed');
    header.css('z-index', '1005');
    header.css('width', '100%');
});