I guess they use cookies, yes.<p>Personally I'm an opera fan, so I haven't tried getting it to work but a quick search brought up: <a href="https://addons.mozilla.org/en-US/firefox/addon/51000" rel="nofollow">https://addons.mozilla.org/en-US/firefox/addon/51000</a>, <a href="https://addons.mozilla.org/en-US/firefox/addon/12625" rel="nofollow">https://addons.mozilla.org/en-US/firefox/addon/12625</a> and <a href="https://addons.mozilla.org/en-US/firefox/addon/11551" rel="nofollow">https://addons.mozilla.org/en-US/firefox/addon/11551</a> as plug-is. As for blocking cookies there are several options.