Hi,
I love the update for the sidebar, makes using Facebook messenger a lot easier as I don't like to use the Facebook feeds.
However I have a couple suggestions to make it more useful.

I'd like the ability to hide the chats so just the chat heads show when opening the messenger, this is to stop opening a message when you don't want to respond to it immediately. Also the ability to also pin the chat heads in the sidebar or as it's own sidebar would be great.

Another thing is that when you're in a messenger call I'd like to be able to pop out the call so I can browse the web when in a video call.

Love your web browser, keep up the good work guys.