Greasemonkey user script: Remove Facebook's external link tracking

remove-fb-tracking.user.js

// ==UserScript==
// @name          Remove Facebook's external link tracking
// @description   Removes redirection from external FB links
// @namespace     https://gist.github.com/k-barton
// @include       https://*.facebook.com*
// @include       http://*.facebook.com*
// @version       0.1.0
// @grant         none
// ==/UserScript==

(function () {

  var redirectionUrl = 'https://l.facebook.com/l.php';
  
  var fix_link = function (el) {
    var isFixed = false;
    
    var onclick = el.getAttribute('onclick');
    if (onclick !== null && onclick.indexOf('LinkshimAsyncLink') != - 1) {
      el.removeAttribute('onclick');
      el.removeAttribute('onmouseover');
      isFixed = true;
    }
    
    if (el.href.indexOf(redirectionUrl) > - 1) {
      var href = el.href;
      var s = href.substring(href.indexOf('?') + 1);
      s = s.split('&');
      for (var i in s) {
        if (s[i].indexOf('u=') === 0) {
          s = s[i];
          el.href = decodeURIComponent(s.substring(s.indexOf('=') + 1));
          isFixed = true;
          break;
        }
      }
    }
    
    if (isFixed && el.textContent !== '') el.style.backgroundColor = '#FFEE22';
  };
  
  document.addEventListener('DOMContentLoaded', function (event) {
    document.onmouseover = function (event) {
      if (event.target.tagName == 'A')
      fix_link(event.target);
    };
  }, false);
}) ();