Can I replace data from the pixelscan site?

Question

JavaScript

Can I replace the data from the pixelscan website? Using a js script and mod header? So far I have managed to change only the user-Agent (http) how to change the rest?

navigator.__defineGetter__('userAgent', function () {
return "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0)"
});
navigator.__defineGetter__('appName', function () {
return "Netscape"
});