Facebook recently has updated their privacy policy and a couple of programmers traced the behavior of how Facebook uses their web cookie and all of the other cookies to gather information about you. A cookie is a small file that exists on your computer, placed by every website and often each of their affiliate advertisers to keep track of your online surfing.
A recent filter has been offered up for Adblock Plus users that helps protect the privacy of each Facebook user on a Firefox or Chrome browser. (Chrome uses something called Adblock Plus (beta) extension.
Download the filter list from their website and add it to your browsers today!