Created attachment 8666367 [details] Application Basics.pdf I've noticed twice over the last month that I get checkboarding artifacts in both content and chrome for Firefox on my Mac Mini. It happens extremely intermittently but when it does happen it won't go away until I restart Firefox. The checkerboarding does not appear in any other part of the screen or any other apps, just the Firefox window. The checkboarding seems to flicker and move based on my mouse movement. I uploaded a video to youtube showing the corruption: https://youtu.be/-KiTuN0Z1fg Please find attached a copy of my Troubleshooting Information page.
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