Earlier quoted context omitted.
I tried to move from Chrome's profiles to Firefox's container tabs. I prefer Chrome's take on it where sessions are shared across all tabs in a window rather than across similarly styled tabs in the same window. .. I just went to find the github issue for other people with a similar need[0] and found someone has posted a link to an extension called sticky containers. A new tab opens in the same container of the last…
Firefox has always had profiles, very much acting like Chrome's, but for some reason they didn't make it easy to use. Navigate to: about:profiles Now you can have multiple windows, each window with its own profile and the profile determines everything, from the browser's history to the extensions installed.
Here is an article that talks through the steps (on windows but it's similar for others) https://www.howtogeek.com/209320/how-to-set-up-and-use-multi...