This extension stops Facebook from tracking you as you surf the web in Firefox; however, this extension does not prevent facebook from tracking you to other sites when clicking on a link posted on the facebook website. The Facebook link-shimming server (l.facebook.com - that's a lowercase L not a captial I) circumvents this container by injecting new copies of Facebook cookies and locally stored objects (LSO) into the newly opened container, tab, window, or even a completely different browser prior to being directed to the link you think you are going to directly.