UTM Stripper

// ==UserScript==
// @name        UTM Stripper
// @namespace   lehollandaisvolant.net
// @description Remove UTM_ url parametes.
// @include     *utm_source=*
// @include     *utm_medium=*
// @include     *utm_term=*
// @include     *utm_content=*
// @include     *utm_campaign=*
// @version     1
// ==/UserScript==
(function () {
  var sp = window.location.search.replace(/^\?/, '').split('&'),
  sk = [
  ];
  for (var i = 0; i < sp.length; i++) {
    if (!/^(?:utm_source|utm_medium|utm_term|utm_content|utm_campaign)$/i.test(sp[i].split('=') [0])) {
      sk.push(sp[i]);
    }
  }
  var newurl = window.location.protocol + '//' + window.location.host
  + window.location.pathname + (sk.length ? '?' + sk.join('&')  : '')
  + window.location.hash;
  if (newurl != window.location.href) {
    (!!(window.history && window.history.pushState)
    ? window.history.pushState(null, null, newurl)
    : window.location.replace(newurl)
    );
  }
}) ();