Google Sheets Cells Turn Black
This randomly happened over the past few months but last couple days it's bad. The Google Sheets cells I have open on Firefox turn black. You can scroll and they will come back but just briefly and back to black. Very annoying as these are shared sheets for my business with other employees. It's not happening in Vivaldi Browser or Edge. I hate Chrome so not even trying it there but guessing it's fine. Seems to just be Firefox all of a sudden. See pic. Help please as I have no clue what's causing this.
Chosen solution
Amazingly Firefox did an update shortly after I posted this and it has not done it since. Hopefully it doesn't happen again.
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Did you try Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#search104
Does it happen under a different user account?
No issues for me using a sample from Google Sheets. see screenshot Is the issue just with your sheet or all sheets from Google?
Modified
Chosen Solution
Amazingly Firefox did an update shortly after I posted this and it has not done it since. Hopefully it doesn't happen again.