Typically for people who use messenger.com for chatting. I always find myself closing 10+ chat boxes on facebook.com, before I can see the content. This removes those by default, and forces you to use messenger.com for chat.
Facebook Anonymous Vendetta Style Animated with dislike button update - more bugfixes. green letters likes and dislikes butttons Update - Bugfixes (images not in border, share... option fixed on ALL Versions