dotmain.user.js

// ==UserScript==
// @name         dotmain
// @namespace    http://enlavin.com/
// @version      0.1
// @description  Adds a dot at the end of the url domains to mess up with ads
// @author       enlavin
// @match        http*://*/*
// ==/UserScript==

(function() {
    'use strict';

    function dotit(url) {
        var u = new URL(url, location.href);
        if (u.hostname != '' && u.hostname[u.length - 1] != '.') {
            u.hostname += '.';
        }
        return u.toString();
    }

    //if (location.href[location.href.length - 1] != '.') {
    //    location.href = dotit(location.href);
    //}

    var links = document.getElementsByTagName('a');
    for (var idx in links) {
        var a = links[idx];
        try {
            a.href = dotit(a.href);
        } catch (e) {
            continue;
        }

        console.log(a.hostname);
    }
})();