Yeah, I find more broken websites out of the box with Firefox than Chrome (even disabling extensions/ad blockers)

I use Chrome at work (corporate provisioned device) and Firefox at home so both get a good amount of usage

It's probably third party cookies but not for long, Chrome will also remove them next year so they will have to do something about it.

Are you sure that your tracking protection is set to "Standard"? You'd have to change it manually to stricter protection.

I know of several sites that break if you go beyond Standard, but none if you don't.

Alternatively read as: “We are actively hostile to user-chosen browser privacy settings such that we develop our application to coach our users to turn these settings off as a necessary means of accessing their account”. I guess that’s what they call a death spiral given that the behavior discourages me from attending any would-have-been-DCI events.

There is a filter list for ublock origin that bypasses such things (and cookie consent popups).

That’s not “working out of the box”, but leads to a much less broken experience than chrome (especially with the manifest v3 BS).