[gtirloni]

It's per window and it remembers the last profile used. I find it hard to manage as other apps will open links on the active window, which might be in the incorrect profile I want to use at that time.

I like this new feature in Firefox. OS-level profiles being the slowest method, Chrome profiles being faster but with this annoyances (for me)... Firefox new container tabs look like a more lightweight/faster method for context separation.