Über dieses Add-on
You should see a Messenger for Facebook™ sidebar right side of the Firefox interface. Please login Facebook™ to start using Facebook™ messenger. The sidebar will remain open and you will be able to see the online status of your friends and chat with them instantly without leaving your web experience.
Messenger for Facebook™ is a helper tool for Facebook™ users. Messenger for Facebook™ is not officially affiliated with Facebook™ or any Facebook™ products. Facebook™ is a registered trademark Facebook Inc.