Earlier quoted context omitted.
Chrome has this too. I doubt its effectiveness as there are ways to fingerprint your browser without using cookies/sessions
Chrome doesn't have this. You cannot run tabs in different contexts in Chrome side by side. Both additional profiles and incognito browsing open a different window, with its own settings.
Which may actually be what pushes me to FF. Not out of spite, just that I was counting on Chrome profiles for this purpose, but they've gotten a lot harder for me to use for that (and were never as good as FF's multi-container thing, it sounds like).