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I don't even have chrome installed and never need it to be honest. Except for some boneheaded sites that refuse FF entirely ( https://business.apple.com is such an offender) I don't have issues with sites not working. Edit: it looks like even Apple has got their act together now, it seems to support Firefox now too. Finally
I just followed your link and it says, "Your browser is not supported. We recommend using the latest version of Safari, Microsoft Edge, or Chrome." So apparently Firefox is subversive and scary enough to make Apple refer me to Microsoft or Google to avoid it. I guess that's what passes for "Think Different" at Apple these days.
Looks like this site was been blocking Firefox users since at least 2018, according to the bug report on Mozilla's webcompat.com issue tracker: