how to stop Facebook track you even if you not registered.

Facebook recently announced an expansion to its ad tracking system — it would target and track people who weren’t even registered with the site.

Did you know that buttons like these allow Facebook, Google, LinkedIn, and others to track your online browsing activities on every site that includes one of these buttons, even if you never click the buttons and (in some browsers) even if you have third-party cookies disabled?

ShareMeNot is a browser extension designed to prevent third-party buttons (such as Facebook’s “Like” or Twitter’s “tweet” button) embedded by sites across the Internet from tracking you until you actually click on them. Unlike traditional solutions, ShareMeNot does this without completely removing the buttons from the web experience.

http://sharemenot.cs.washington.edu/