Safari 15.2 Version 15.2 (17612.3.6.1.6)

[dh024 (David H)]

There is an ongoing issue with Safari that affects more than just the Bitwarden extension, unfortunately.

This will probably fix it:

Bitwarden disappeared from Safari 15 in Big Sur

Yeah, this did the trick for me. So: Close Safari Run the command: /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user Open Safari Go to Preferences > Extensions. It should be back in the list. Thanks tgreer++