Facebook just took the surprising step of adding a way for users of the free anonymizing software Tor to access the social network directly. Tor is an open source project that launched in 2002 to provide a way for people to access the internet without sharing identifying information such as their IP address and physical location with websites and their service providers. People who download the free Tor software can visit websites while keeping the actual location of their computer and its make and model secret. While Tor users could previously access Facebook before today, it often loaded irregularly with incorrectly displayed fonts and sometimes didn't load at all, because Facebook's security features treated Tor as a botnet — a collection of computers designed to attack it.
Full Story and Source Here; http://www.theverge.com/2014/10/31/7137323/facebook-adds-direct-support-for-tor-anonymous-users