Reddit Dark Theme

It's a dark theme... for reddit...
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// ==UserScript==
// @name         Reddit Dark Theme
// @version      0.3
// @description  It's a dark theme... for reddit...
// @icon         http://keycdn.mturkcrowd.com/data/avatars/l/0/132.jpg?1452627961
// @author       Danny Hinshaw
// @namespace    http://nulleffort.com/
// @match        https://www.reddit.com/*
// ==/UserScript==

(function() {
  'use strict';
  /*jshint esnext: true */

  // Set CSS sylesheet for Dark Theme
  const css = '#header { background-color: #393994; }'+
        'body { background-color: #0F0F14; }'+
        'a.title.may-blank.loggedin.outbound  { color: #5454A7; }'+
        'a.title.may-blank.loggedin.outbound:visited  { color: purple; }'+
        'a.title.may-blank.loggedin  { color: #5454A7; }'+
        'a.title.may-blank.loggedin:visited  { color: purple; }'+
        'a.title.may-blank  { color: #5454A7; }'+
        'a.title.may-blank:visited  { color: purple; }'+
        'a.title.may-blank.outbound  { color: #5454A7; }'+
        'a.title.may-blank.outbound:visited  { color: purple; }'+
        'p { color: #5454A7; }'+
        'div.listing-chooser.initialized, div.side { background-color: #222271 }',
        style = document.createElement('style');
  style.type = 'text/css';
  style.appendChild(document.createTextNode(css));
  document.head.appendChild(style);

  // Remove sidebar ads
  [].forEach.call(document.querySelectorAll('div.dfp-ad-container'), e => e.parentNode.remove());

  // Timeout to remove ad's that are loaded after the page has finished loading
  setTimeout(() => {

    // New 'organic' ad placed on frontpage
    [].forEach.call(document.querySelectorAll('.content div.spacer'), div => {
      const potentialAd = div.firstChild.firstChild;
      if (potentialAd && potentialAd.classList) {
        return potentialAd.classList.contains('promoted') ? div.remove() : null;
      }
    });

    [].forEach.call(document.querySelectorAll('p.tagline'), e => {
      if (e.innerText.includes('promoted')) e.parentNode.parentNode.remove();
    });
  }, 250);
})();