I'm not upvoting because of the snarkiness, but I found myself in the exact same situation yesterday. Today it magically works fine again.
If there is any netflixer around here: please, please push for better testing to prevent that from happening again (i.e: firefox should be one of the test platforms!)
FWIW, Firefox has been behaving quite weird for me for the last 2-4 weeks (Linux version). It randomly freezes and slows down during page loading, even crashed a few times. Seems to happen mostly when there is some video content on one of the tabs, so I'm blaiming the plugins for now. Kinda sucks because I switched from Chrome few months ago only. I really hope I didn't make a mistake.
Same thing happened to me last year. I got very hyped up on the switch. But then it turned into hot garbage.
Tried to get support on the firefox subreddit and they told me I shouldn't be using Firefox Beta if I'm not "technically inclined". Okay, so I switched to the normal release and it was too slow for me to even bother. Back to Google...
I'm wondering if their new quantum engine fixes issues. Are you on that newest version?
Have also had issues for a month or so now. Weird stuff like trying to do a search in incognito mode, which should do a Google search, and it spinning forever.
Nothing happened.
I saw The spinning loading wheel and the firefox/netflix header saying "blah blah audio video software being installed try again blah restart blah"...
I waited, I reloaded the page, I googled, I checked the DRM settings, I did blah blah blah.
Wasted time and frustrated I then opened microsoft edge and everything worked.
You know that firefox share is at 8% according to W3Counter? You know this kind of crap will only reduce this?
And then we'll only have the big daddy corporate sponsored browsers.
And all because users want to watch netflix.
What a bag of mediocre horse shit.