[jamesgeck0]

> Can't you only have one profile open at a time

No. Each profile opens in a new Chrome window. You can have as many open as you'd like.

> and each one is linked to a different Google account?

No. Local profiles have always been a thing.

Chrome's implementation has better UX for privacy IMHO; it's harder to accidentally open a tab in a different profile than expected, which I do _all the time_ in Firefox. In Chrome, Cmd+T opens a new tab in the active profile. In Firefox, Cmd+T opens a new tab in the default profile.

[daveFNbuck]

Yeah, the implementation could use some work. I also use the temporary containers plugin so by default tabs open in new containers. I think this gives better security than either of these defaults. If I need a site to open up in a particular container, I can always set that too.