Not a bad answer but passing the culprit (again) ? 
The question remains: Should Bitwarden as a serious Password Manager not take up its responsibility and urge Mozilla to hurry up?
Isn’t Bitwarden in essence for safety on the internet, and not for a fancy-look?
See also : PIN Unlock in Forefox no longer working in 2023.8.3 - #25 by sjokoboy