Actually there’s one better - if you go to about:profiles in the URL bar you can make a new profile that is COMPLETELY separate, including history. Only annoying thing is that you have to go there every time you want to open a window in a profile other than the default
If storage isn’t a concern you could always use multiple portable Firefoxes. Of course that means maintaining multiple FFxes, but once you configure one, you can just copy-paste the folder.
Actually there’s one better - if you go to about:profiles in the URL bar you can make a new profile that is COMPLETELY separate, including history. Only annoying thing is that you have to go there every time you want to open a window in a profile other than the default
If storage isn’t a concern you could always use multiple portable Firefoxes. Of course that means maintaining multiple FFxes, but once you configure one, you can just copy-paste the folder.