> Do you mind explaining why?

I want full blown segregated browser experiences, a la Chrome's profiles. Firefox's containers are great for what I use them for (sandboxing Twitter and Facebook), but I'd really like an entirely different profile for "work" vs. "personal"--with separate browsing history, favorites, cookies, extensions, etc.

I know Firefox offers that functionality (via about:profiles), but as far as I know, it's not as simple to access in Chrome (clicking an icon and choosing your new profile).

That being said, I still use Firefox day to day, but I sorely miss the ease of access of Chrome's.