I can see some failures of communication here, most likely because this is such a long thread.
@
AnpuRa I would really recommend you
completely uninstall McAfee. Not only is it a famously bad antivirus, it causes more problems than it solves. Antiviruses like McAfee don't like being turned off, so they never really turn off. The only way to "disable" them is to entirely remove them from your computer.
As the others have said, you're on Windows 10 so the basic defender should keep you safe for a short while. If you want a replacement antivirus, I always recommend
ESET
It's definitely possible McAfee is causing the problem here, though it's weird that it isn't doing the same to FA.
I see you stream, or used to stream, your art quite regularly. That could be the tool we've been in need of.
If uninstalling McAfee doesn't solve the problem, consider setting up a stream for Kaepora - or someone else, but Kaepora is in the best position to help you - to see your browser and help you navigate it and the dev tools in real time.
EDIT: Just realised I'm going to have to walk you through uninstalling.
Here are two separate sites which will each guide you through removing McAfe:
https://www.digitaltrends.com/computing/how-to-uninstall-mcafee/
https://proprivacy.com/privacy-service/guides/uninstall-mcafee-antivirus-software
They're practically identical but the digitaltrends guide goes into a little more detail, so you're probably better off following that.
Digitaltrends recommends a few different AVs, including both Avast and AVG. I would personally not recommend either of those. They're becoming more troublesome each month and you may soon be in the same boat.