Firefox 144 features a new profile switcher, which is a lot nicer than about:profile or a desktop shortcut to open the profile prompt.
However, Librewolf seems to have deactivated it because it’s behind the Firefox account button.
Will it be fixed? I use profiles on all my devices, and I’m quite tired of always going to about profile just to open another one
Hopefully they’ll offer some way to do this soon, but until they do the simplest way is probably adding about:profiles to your bookmarks toolbar and/or adding the flag to the taskbar/desktop/whatever shortcut