>>687
来ちゃった///
Firefox 139.0.1, See All New Features, Updates and Fixes
https://www.mozilla.org/en-US/firefox/139.0.1/releasenotes/
Fixed graphics corruption with certain NVIDIA graphics adapters and multiple monitors running at mixed refresh rates after updating to Firefox 139. (Bug 1968876)
1968876 - screen corruption on multi-monitor setup when playing 60fps video on second monitor
https://bugzilla.mozilla.org/show_bug.cgi?id=1968876