Same here, My switch happened over the weekend. Still looking for a convenient way to have profiles that are like chromes user button, but overall I'm happy to escape Google's grip.
It doesn't work in exactly the same way - you don't by default get a different window per-profile. Instead, tabs get a different colour for each.
You can also use Firefox's about:profiles page can to open and manage different profiles in different windows in one running instance of Firefox.