Ubuntu
firefox package

  1. Bug #1917300
  2. Comment #19

Comment 19 for bug 1917300

Revision history for this message
Olivier Tilloy (osomon) wrote :

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.