I think his point is that if you have to do about:profiles, then that's not usable for a lot of people. Having something that works like containers is a lot more usable: click, select profile.
See, that's exactly what I'm talking about. Whereas in Chrome I _don't have to_ "try about:profiles".
The very basic requirement for me is this: I want to completely separate my "work" internet from my "personal" internet, yet I also want to be able to easily switch between the two. Firefox makes this unnecessarily difficult and un-ergonomic.
I consider that an epic fail. The last thing I want is to confuse the two, or to have to laboriously manually separate tabs into windows. That's not to mention that I also don't want to share the passwords between the two profiles either.
What's the most frustrating is Firefox already has multiple profile support. All it's missing is an ergonomic way to switch and manage the profiles.
You can have two desktop shortcuts with different icons that start the browser with different profiles. With different profiles you can make the browser windows have very different customized looks and differnt profiles also have separate password storages.