My favorite hidden feature in Firefox is having multiple profiles[0],[1]. Unlike containers, profiles have separate bookmarks, extensions, etc. I have found pro

My favorite hidden feature in Firefox is having multiple profiles[0],[1]. Unlike containers, profiles have separate bookmarks, extensions, etc. I have found profiles even more useful than containers for development. [0] about:profiles (paste into URL bar in Firefox) [1] https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles https://support.mozilla.org/en-US/kb/profile-manager-create-...