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 incor

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.