For a while now I can't even access WhatsApp Web [1] through Firefox. It gets stuck on the loading page and keeps refreshing itself forever. I have to resort to Chrome whenever I need WhatsApp on my laptop.
Looks like there are already a couple bug reports about whatsapp.com, but not the forever-refreshing page you see:
https://webcompat.com/issues?page=1&per_page=50&state=open&s...
It's absurd that this is even possible. They should at least provide troubleshooting advice for end users.