Even if you disregard that Lastpass has major issues in regards to privacy, consumer trust, corporate greed and just dumpster fire terrible customer service, Bitwarden as a software extension and cloud service is light years better.

The Lastpass extension for Firefox is a red headed step-child for whoever owns Lastpass today and it is a broken mess. Bitwarden, on the other hand, works great in Firefox, auto fills without hassles, it offers so many more security options and the interface is so much easier to use and far more polished.