Brave is overriding all other programs

When brave is open I cannot toggle between any other nor use any other programs.
Brave forces itself to be on the top.
This happened when I attempted to add a new Gmail email account in Mac mail, it forced open a Gmail page in brave and from then on I’ve had this problem.
So I have to quit brave to do anything else.
Also my computer’s fan is running full pelt now.
There’s obviously something going on in the background but I cannot determine what…???