Comment by Vinnl

And for those who do actually feel they want to separate their extensions and passwords and such as well, there's a Profiles revamp coming up that's looking really good in Nightly: https://connect.mozilla.org/t5/discussions/here-s-what-we-re...

But yes, people should learn about Multi-Account Containers if they haven't, yet. It's a killer feature that no other browser has. This is the extension to enable the UI for it: https://addons.mozilla.org/firefox/addon/multi-account-conta...