I've been using Zen for a few months after I lost faith in Arc/The Browser Company.

I like the workflow of swiping between profiles, vertical tabs and pinned favorites. I haven't been able to find a browser that works just like that.

I'd prefer to use Chromium over Firefox though, that's the only downside. I keep running into weird Firefox specific issues. Passkeys didn't work properly (and still won't support TouchID), pages don't render correctly, etc.