Bitwarden checks all the boxes. I’ve had great experience with it. bitwarden.com
I will say, auto-fill on load is a bad idea. On desktop I keep my auto-fill bound to a key so it doesn’t actually end up in fields it shouldn’t be.
2FA is locked behind the $10/year premium if that’s something you wanted, but beyond that the free plan has everything 99% of people will use. They do third party security audits, have public white papers, and is completely open source.