I'm thankful to work in a team. As my IT dept has a habit of breaking stuff with AV and other crap-ware, I already asked if anyone else was having problems with Firefox after 5 minutes of trying to figure out what was wrong, after which someone pointed me to this thread
Unfortunately, with work-from-home that puts me in isolation. I did try it with Chrome and that worked so it at least clearly was a FF issue but I never ever counted on features with embargo dates. That totally messes up my inbound QA on new FF releases because that means that no matter how much I test a browser in my sandbox by the time the automatic update propagates to the machine I work on I can still get hosed.
Very frustrating this. Fortunately it isn't a Tuesday or I would have been ready for murder by now.
I also work from home; I just asked around in the general chat.
As I instinctively was already blaming out IT dept for breaking Firefox for some security theater reason I was glad I found the real issue quickly, otherwise I might just have accidentally dropped my laptop out the window