@ricci I get what containers do, but I really want all my environments to be completely separate with their own bookmarks, their own settings, and their own sets of tabs. For this I use Firefox profiles, which are like Chrome profiles, but which I never understood why they are so deemphasized by Mozilla. The only way I know to get to them is with the URL about:profiles, or with the command line `/Applications/Firefox.app/Contents/MacOS/firefox -p &> /dev/null &`.