You can try to disable hardware acceleration in Firefox. *Settings -> General: Performance<br>remove checkmark: [ ] "Use recommended performance settings"<br>remove checkmark: [ ] "Use hardware acceleration when available" *https://support.mozilla.org/en-US/kb/performance-settings Close and restart Firefox after modifying the setting to make changes effective. *https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems