the issue with hiding the system window toolbar is that it puts a border around the window buttons, which is inconsistent with other programs. kind of a shame they did this redesign, as get messages and new message are now lopsided and send gets more piority. it just looks like it was poorly put together in photoshop or something.
and i kinda see what they were going for this redesign but honestly it’s too much imo, it’s trying to make thunderbird something it’s not.
after all we chose thunderbird because of its oldschool look, now they’ve kinda ruined it. still going to be using it though.