Go to Help > Troubleshoot Mode. That will start Firefox with no extensions running.
If the problem goes away... then it's one of your extensions causing the issue.
If the problem remains (even in Troubleshoot Mode)... then I'd use REVO Uninstaller to completely uninstall Firefox. Export...
MS has been doing a LOT of messing around with people's MS Accounts lately.
It's like they're trying to figure out how to capitalize on MS Account things.
They've been tying more and more things to the MS Account.
IMO... they are trying to convert everyone to the idea of "Windows as a...
Try changing you date of birth to make yourself 65. Aka a senior citizen?
Lots of things change when you're 65.
Like 18,000 senior citizen orgs start calling and emailing you with all kinds of "deals". LOL
If 65 doesn't work... try whatever your Social Security age will be.
I was born in...
I did, and I get the error.
However, MS has had problems with the account picture... since back in 2018-ish, on Win 10 also.
This is not a new issue. It's slightly different, but it's still just plain broken.
MS has been "working on a resolution" for 6 years now. LOL
It seems like every few...
It's probably just something MS missed.
If the picture changes... don't worry about it. :-)
It's been over 2 years, but I seem to remember something about there's two different Account avatar pics, and one of them is broken?
Mine does the same thing... (I tried .png and .bmp... .bmp...