The most useful feature with the worst UX. You have to type about:profiles and then create a new profile. But imagin you now want to move old profiles to a new computer and FF happens to run in a Flatpack. Yeah, much fun
You can (now?) create profiles from the account icon in the toolbar [1] and at least on my firefox install, you can also do it from the hamburger menu.
I use firefox via flatpak and had no issues so far accessing profile data (in one of the folders in ~/.var/app/org.mozilla.firefox/.mozilla/firefox/ - I keep a regular archive of the entire folder as backup).
I'm on 144.0.2 on MacOS and I do have it. Under the hamburger menu in the upper right and near the top of the list. Never set up a profile on this machine before, so maybe that could be related?
I found out about profiles recently and I just couldn't believe that that's the standard way to access them. Also, it's not obvious which profile you are currently on, so there are some silly but necessary workarounds like having a dummy bookmark with the profile name on each or something like that, while it could just be a string next to the address bar.
It works really well though. Does exactly what I would expect and hope from such a feature.
Huh, I had no idea the <profile> argument to -P is optional (--help does not say), I was always using --ProfileManager instead. Nice quality of life improvement, thanks for the information!
That used to be a start menu entry in the old days. I had heard it was removed but to my surprise -P works on my current linux. I'll have to see if it does actually start a new profile.
Use -p in your shortcut to firefox and it will show the profile manager on launch, from that you can easily create a new profile or open a new window on existing one.
