Priv3 on Geek.com

"Priv3 Firefox Extension Stops Social Networks Tracking You"
October 6, 2011  |  Will Shanklin, Geek.com

excerpt: 
We all know that the internet has become saturated with social networking. If you can read it on the web, chances are you can also “Like” it. It’s only natural that, if you share something, Facebook or Google will know that you visited that page. It’s also likely that they’ll use that data to sell advertising. What most of us don’t know, however, is that those same networks can track your visits to many pages even if you don’t click on any sharing buttons. Enter Priv3, a new extension for Firefox that only allows your visits to be tracked when you want them to.
research area: 
recap: 
Networking researchers have built an extension for Firefox that keeps social networking sites from tracking your movement on certain Web pages without your knowledge.