TrackMeNot is a browser extension that protects web-searchers against surveillance and data-profiling. It does so not by means of concealment or encryption (i.e. covering one's trail), but instead, paradoxically, by the opposite strategy: noise and obfuscation. With TrackMeNot, actual web searches, lost in a cloud of false leads, are essentially hidden in plain view. User-installed TrackMeNot works with the Firefox Browser and popular search engines, e.g. AOL, Yahoo!, Google, and MSN.
After AOL's security breach, it's a good idea to use this if you use an ISP or personal ADSL connection. You just never know if some crazy person out there might get hold of your key search terms!!