This UserScript redirect the kickasstorrents and extratorrent old and block domains to new and proxy domains! You have to install Tempermonkey or Greasemonkey extension/addon in your browser! and you must Allow pop up for extratorrent.cc

torrent-old-to-new.user.js

// ==UserScript==
// @name         Access Torrent Directly From Old Domain
// @namespace    http://maxyspark.com/
// @version      0.1
// @description  try to take over the world!
// @author       MaxySpark
// @match        http://kat.cr/*
// @match        http://extratorrent.cc/torrent/*
// @match        http://torrentunblock.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var url = window.location.pathname;
    var host = window.location.hostname;
    function OpenInNewTab() {
            var win = window.open("http://torrentunblock.com/unblock/extratorrent.cc/", '_blank');
            win.focus();
            if(!win){
                alert('enable pop up for extratorrent.cc');
            }
    }
    function start() {
        if(host==="kat.cr") {
            window.location = "http://kickasstorrentsan.com"+url;
        }
        else if(host==="extratorrent.cc") {
            OpenInNewTab();
            window.location = "http://extratorrent.cc.prx.torrentunblock.com"+url;
        }else if(host==="torrentunblock.com") {
                document.querySelector("form > button").click();
                console.log(host);
            }
    }
    
    start();
})();