Youtube was extremely slow on firefox a few years back, because of non-standard web technologies designed by google for chrome A lot of video conferencing software is also purposely broken on firefox (slack, teams etc...) others like whereby work fine, but slack and teams are both massive

BNP bank site rarely but regularly breaks on FF (just shows white screen). At least one payment processor had disabled input fields, so not working. At least two railway portlas in two different countries effectively didn't work for some time because station dropdowns were broken and you couldn't proceed next without selecting. Just today I found a bug in Jira, when external integrations don't work on FF. Stadia doesn't work on FF by design. Skype web doesn't work on FF by design. Streaming services block streaming high def stream to FF because it lacks DRM unlike Chrome clones.

All of this I saw in the last few years, some of that is still valid today.

I have a website that relies on a quirk of Chrome’s rendering, which leads to scrolling not being handled the way I want in Firefox.

Browser compatibility bugs absolutely exist.

See https://github.com/webcompat/web-bugs/issues for some more examples.

Until recently[1], jitsi was not working properly on Firefox.

Which was very frustrating given they are both free software :(

1: https://github.com/jitsi/jitsi-meet/issues/4758#issuecomment...

You usually can't tell they are broken until you get to the last part of a multi-part checkout process.

Google Earth

I just tried it in FF and it works fine

System requirements for Google Earth

- Google Chrome 67, Firefox 63, Edge 79, or Safari 11.

- Make sure that you turn on hardware acceleration.

But I do know that Apple Business Manager wont run - not sure why as it seems to be a fairly basic interface and says Firefox is supported, but yea I have to use Chrome for that

It works mostly fine now, but when the web version was released it wouldn't even allow you to use Firefox, and straight up pointed you to Chrome.

I didn't realise that was even still a thing!

That seems like it'd be google nerfing other browsers, they're pretty anticompetitive. If it doesn't work in FF and is still maintained I bet if you change the browser identity to pretend it's chrome it'd probably work.

Seems fine in Firefox (102) to me.