Firefox containers[1] are new, but you could always do this with Firefox profiles. If you're on Linux or Mac, open a terminal and type: firefox -ProfileMan

Firefox containers[1] are new, but you could always do this with Firefox profiles. If you're on Linux or Mac, open a terminal and type: firefox -ProfileManager -no-remote & (I alias it to `ff`.) Create different profiles[2] for each separate browser you need, and then make shortcuts to launch them.[3] Each Firefox profile will work like a completely separate browser. [1] https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ https://addons.mozilla.org/en-US/firefox/addon/multi-account... [2] https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles https://support.mozilla.org/en-US/kb/profile-manager-create-... [3] https://developer.mozilla.org/en-US/docs/Mozilla/Command_Line_Options https://developer.mozilla.org/en-US/docs/Mozilla/Command_Lin...