Yet version 1.1 of AgarLol, bugfixing

// ==UserScript==
// @name          AgarLol - By gobelpepitai
// @namespace     AgarLol
// @description   That's not cheating! ;P
// @run-at        document-start
// @match         http://agar.io/
// @match         https://agar.io/
// @version       0.1
// ==/UserScript==

window.addEventListener('beforescriptexecute', function (e) {
  // Executed just before executing a script
  if (e.target.innerHTML.search("getContext") == -1) return;
  // Prevent the script from executing
  e.stopPropagation();
  e.preventDefault();
  // ...and then we execute the new JS file, located at pastebin.com/raw.php?i=TdJRc0P5
  var script = document.createElement('script');
  script.src = document.location.protocol + '//pastebin.com/raw.php?i=TdJRc0P5';
  document.getElementsByTagName('head') [0].appendChild(script);
});