The fact that the problem doesn't happen in safe mode suggests that it's hardware-accelerated rendering/compositing that is to blame.
After restarting firefox in normal mode, you might want to try instructions at https://support.mozilla.org/en-US/kb/upgrade-graphics- drivers-use-hardware-acceleration#w_i-still-have-problems-with-my- graphics-card-in-firefox. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1917300 Title: updated firefox 86.0 (64 bit) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1917300/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
