So I was trying to put the Facebook social service on another computer, but it seems it is no longer available at https://www.facebook.com/about/messenger-for-firefox. Also, the Mozilla support page is only listing 3 services: Cliqz, Van's Triple Crown of Surfing and Delicious. Has the facebook social service been removed? I can't seem to be able to find any oficial statements about this. Just want some confirmation. Note: It is still working on my other computer without any problem.