On iPhone?

Yes. Cross platform ideally

Yes, Firefox supports multiple profiles they’re just hidden a bit.

Quick method:

Close Firefox

Press Win + R

Type: firefox.exe -P

Create and manage profiles from there

Each profile has its own history, logins, extensions, and settings.

You can also type about:profiles in the address bar to manage them directly.

So it works just not as visible as in Chrome.

@Bisharat Ullah Khan, They've asked about iPhone; exe files don't work there, there's no keyboard with Win key and about:profiles is missing.

I see both containers and profiles in the desktop app. Not seeing it in IOS. That being said, I think the IOS browser is a really good one.