But a lot of "normal people" actually need a secrets manager which is larger in scope than just a "websites urls passwords manager". This means a password manager with extra metadata fields for users to add notes, associated email aliases, etc. E.g. if a website has an extra step of "Confirm your identity by answering this question : What was your childhood pet's name?", users want a place to save the answer ("BugsBunny") in the "notes" field of a password manager.) Another example would be the secret PIN unlock code for the spouse's phone. That's not a website url, it's just a "secret" that needs to be stored in an encrypted file.
Firefox password manager is too bare-bones with the only 2 fields being "Username" & "Password".
The better UI/UX for normal people is to have a unified app to store all their secrets instead of having some secrets in the Firefox password manager and other non-web-url secrets saved separately in yet another app.