[nneonneo]

You can definitely have two profiles open simultaneously - on MacOS, this is achieved with “open -n Firefox.app --args -P [profile name]”; on Windows, “firefox -no-remote -P [profile name]”. Admittedly, that should _really_ be exposed in the UI somehow, but at least it means you can wrap up the command in a handy desktop shortcut (e.g. one that says “my Firefox” and one that says “her Firefox”).

[chaghi]

> Admittedly, that should _really_ be exposed in the UI somehow

Go to about:profiles, click the "Launch profile in new browser" button under the profile you want.

Yes, it's not obvious, and the UI has a lot to be desired if you want to explain the feature to some non-techie, but you no longer need to close the other Firefox instances in order to launch a different profile. I think this was added a couple releases ago.

[itwy]

Thank you. I didn't know FF had profiles to begin with.

[mccr8]

Be aware that running multiple profiles at once can cause issues with updates. One instance can end up updating, which means that the other instance can no longer create new processes, because it is still on the old version, and it gets updated in place.

[neogodless]

OK - I hadn't come across that. I actually have the shortcut on my desktop that prompts you to pick a profile if you don't have any windows open already. I'll have to see if I can tweak the shortcuts to open each one! Thanks!!

[chaghi]

Yust a heads up: you can open different profiles simultaneously using the about:profiles page, see my other reply.