I’ve noticed recently several sites seem to lock up Brave.
One that recently caused a lockup is https://www.express.co.uk/life-style/property/1513895/ring-doorbell-legal-battle-data-protection-evg
At the time I had about 20 browser windows open.
I tend to leave a lot of windows open so this could be some kind of resource hog issue.
I’ve also seen Barclays.co.uk freeze during the login process, unfortunately I can’t give you steps to reproduce as you need to login via 16 digit debit card number to see the issue
This is on Linux Mint 20.3 (Ubuntu 20.04) on dual 2690 xeon with 32gb ram- issuing killall brave does work but in the past it seems to have caused a mouse input lock and I’ve had to use ctrl-alt-f number to change to terminal and kill brave from there.