I have started to get a graphics glitch after the most recent 10.15.7 updates both normal and security. I occasionally get a small rectangular box in the lower right hand corner of the display just to the right of the dock. It invariably is a part of a graphic I saw on Facebook using Firefox 81.0.1. It pulses on and off with a regular sequence and also tends to respond to mouse clicks in weird ways.
Anybody else seeing this??
Anybody else seeing this??