FF also has multiple profiles feature. But nothing matches Containers. Containers are different. Containers keep only the identity data (sesssion, cookies etc.) separate. All other data is shared. Profiles are painful. History, Password Manager, Bookmarks all are accessible and shared across FF containers. This makes it really useful.

You can't mix tabs from multiple profiles in the same window, though. And they don't share extensions etc. They're much heavier weight than containers.

I don't think you can use them to automatically sequester urls to certain profiles though? That's a serious limitation for my use - eg. I always want gmail to open in my logged-in 'engoogled' container, and never want plain google searches to be logged in. I don't want to manually enforce those rules (that's what computers are for).

Good point, but one of the key aspects about Firefox's implementation is that you can have different container tabs within the same window. As far as I know, that's still not possible with Chrome.

There are people who swear by Chrome’s profiles, then there are people who swear by Firefox’s containers. I’m in the former category. I’ve learned through various debates that as always, you’re not gonna convince anyone on the other side.