Decades old Firefox user here.

In the last week or two both Discord as well as Google Maps started not to work, they basically freeze up during/after they load, almost freezing up the whole browser as well (struggle to close the tabs they are on).

The weird thing is they both always used to work great up to just very recently, and nothing else has changed on my desktop, except for the normal OS updates semi daily.

(Speaking of the desktop version, on Fedora Linux.)