@hawthornbunny Yeah, ur right, it's Google Chrome based. Must have gotten it confused with a different browser.
Yeah, maybe the profile switcher isnt on stable yet.
Anyway, you don't need the new UI to use profiles.
Firefox has had profiles since forever.
It just hasnt been advertised in the UI since it was considered a complex concept for casual users.
You could always access it by going to about:profiles