I use Firefox for Container tabs. It’s useful for sites where I can’t have multiple tabs opened to same site but different login. That’s my main reason for sticking to Firefox.
If chrome is force divested the browser market is going to look very different.
This keeps the cookies separate and means you are tracked less. Yes you can manually do this with Chrome profiles, but before this feature was introduced into Firefox I had a dozen or more Chrome profiles to keep all my work, community and personal Google/Microsoft logins separate.