I use profiles because I need to test stuff with different extensions. Before the Quantum release we had a pretty cool extension for managing profiles that is

I use profiles because I need to test stuff with different extensions. Before the Quantum release we had a pretty cool extension for managing profiles that is no longer available, sadly: https://web.archive.org/web/20181102210053/https://addons.mozilla.org/en-US/firefox/addon/profilist/ https://web.archive.org/web/20181102210053/https://addons.mo... I hope it gets implemented again. I now do the "about:profiles" thing I mentioned. I don't know why they aren't exposing Profiles in the UI in an intuitive manner, makes no sense. For my day to day use, I think Multi-Account Containers are better though.