As a longtime paying Lastpass customer I think that Bitwarden offers a fresh breathe and it is less in my face than Lastpass.
Great job!

Recently I got interested in different Firefox releases (developer and nightly) and I found out that login only works with success in the Stable release.

Only after the login is completed in Firefox Stable release (including multifactor security) will Bitwarden function in the developer and nightly releases.

Only feature that I'm not sure how to deal with is the missing credit card form fills that Lastpass offers, I didn't find any tips in the documentation on how to do this.