It “interferes with Facebook’s intended limitations or impairs the proper working of Facebook”
Rzadkowolski has been working on this plugin for over 18 months. Facebook didn’t seem to have a problem with it all this time. Either a new feature caught Facebook’s attention or the company simply decided it had gotten too big to ignore.
Friendly Gaming Simplifier is a Firefox and Google Chrome extension that simplifies the process of accepting gifts and bonuses from your Facebook Games neighbors.
Friendly Gaming Simplifier also features support for sending gifts.
The Friendly Gaming Simplifier add-on is cross-platform and it works on Mac OS X, Windows and Linux.
More:
http://www.zdnet.com/blog/facebook/facebook-bans-browser-plugin-fgs-and-its-developer/6955
