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About this Add-on
You should see a Facebook™ Messenger 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.
Facebook™ Messenger is a helper tool for Facebook™ users. Facebook™ Messenger is not officially affiliated with Facebook™ or any Facebook™ products. Facebook™ is a registered trademark Facebook Inc.