I keep waiting for better profile management. Not saying it needs to mirror chrome exactly, but feature wise it falls short (at least how I would like to use it).
While they are passable, if you have used/setup profiles in Chrome, it's a far better user experience with more flexibility. Normally, I would go into app grouping in the start menu, but I just realized I am commenting in the Linux community. 😂
I'd much rather use a separate Firefox (now Mozilla I think) account for my professional work. I also would prefer having separate extensions, notably Zotero connector is kind of useless for my personal browsing
I use multiple accounts with Firefox containers, on office.com specifically. One container for my normal account and one for my admin. It works great for me but maybe there are other sites it doesn't like.
Basically you use it to have multiple browser instances with their own configuration(settings, extensions, tabs) for whatever reason. I use it to separate work and personal stuff.