When you surf the net, and visit a website, there are a number of trackers that are keeping an eye on your behaviour. This is how for instance Google or Statcounter are able to create profiles of visitors. Firefox now has a plugin that prevents that and protects the privacy of users. The Ghostery plugin has been a useful addon to Firefox and recently version 2.0 was made available, which encompasses TrackerBlock. I am really happy with its smooth performance. Besides blocking 'web bugs' Ghostery also blocks advertisements, widgets and other trackers.The release of TrackerBlock another step in obtaining a collection of tool to protect your privacy and manage your relation with Third Party Advertisers, Behavioral Targeters and web analytics. Or in the words of the site itself:
"Ghostery alerts you about the web bugs, ad networks and widgets on every page on the web.
Web bugs are hidden scripts that track your behavior and are used by the sites you visit to understand their own audience."
Ghostery 2.0 is can be downloaded at Mozilla Addons as well.