Firefox extend to other monitor
https://streamable.com/81907 << Video of problem
My Firefox crashed yesterday and I lost all addon settings. I did a windows restore point to two days earlier to recover my settings but now that I've had this problem where the browser extends to my first monitor. I've uninstalled, deleted profile folder and Firefox directory and reinstalled but the problem still persist. When I fullscreen a video and exit it, a couple of pixels extend to my first monitor the whole time until i exit the browser. This doesn't happen on chrome.
Monitor 1: 2560x1440 Monitor 2: 1920x1200
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You can try to disable hardware acceleration in Firefox.
- Options/Preferences -> General: Performance
remove checkmark: [ ] "Use recommended performance settings"
remove checkmark: [ ] "Use hardware acceleration when available" - https://support.mozilla.org/en-US/kb/performance-settings
Close and restart Firefox after modifying the setting for changes to take effect.
You can check if there is an update for your graphics display driver and check for hardware acceleration related issues.