Safari Extensions missing

I just had the same issue with Safari 15.2 - my Ghostery ad blocking extension disappeared from the extensions list in preferences.

The solution was to:

1) Close Safari

2) Open a Terminal and execute this command:

/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user

3) reopen Safari

and Safari then found my missing Ghostery extension and allowed me to re-enable it.

I figured it out from here: https://eclecticlight.co/2019/03/25/lsregister-a-valuable-undocumented-command-for-launchservices/

Hi linzhess,

It appears that your installed extensions have disappeared from Safari > Preferences > Extensions. Are you able to go into the App Store app and install those again? As seen in the following article: How to install Safari extensions on your Mac - Apple Support

We hope that helps.

Take care!

This helped me fix an issue with Avira Password Manager in Safari 15.3 for macOS Monterey. Life saver. How did you figure this out?!

Sweet thanks!

This worked for me as well. Symptomatic of Apple nowadays that things break silently and you have to go digging deep into OS internals to fix.