Thanks, it worked. It's still annoying that I have to do it every time.Yea it‘s really annoying but if you are watching in a browser you can just rightclick on the “live“ banner, click on “inspect“ in the drop-down menu and press the delete button and it will disappear (it‘s very likely that you have to repeat the previous steps till every part of the banner is gone).
Note that if you refresh or close and reopen the page it will appear again.
Here you go:Since facebook doesn't allow the chat to hide, except for fullscreen mode (afaik at least)