Firefox-Hilfeforum

I have been getting this error message for over a week now, PR_END_OF_FILE_ERROR. My internet is fine and I have restarted my computer a few time since the problem started. I have added some sites to the Exceptions list but even then they don't work properly. I have tried refreshing Firefox and changed the profile and they both didn't fix the problem. I am sadly not knowledgeable enough to make sense of the Web Developer Tools. The attached image is what my YouTube page looks like after add the site to the Exceptions list.

WILL YOU STOP THAT PATRONISING "HMM, WE'RE HAVING TROUBLE FINDING THAT SITE" MESSAGE NOW

IT IS OBVIOUS THAT IT SHOULD SIMPLY SAY " NO INTERNET CONNECTION" IT IS INFURIATING.

DO IT NOW OR I WILL KILL MYSELF.

I have noticed 3 new bookmarks I never added for 2 websites I've visited recently show up in my bookmarks bar.

I did a scan with Avast One (free version) and it says no viruses or malware found

Any thoughts on what's adding the 3 bookmarks?

Thanks.

Windows 10 Firefox 120.0.1 64bit