Safari 15 on Catalina extension uninstalled itself

[fascox]

Steps To Reproduce

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. Click on '...'

Expected Result

Extension load and appear in extension list in

Actual Result

not showed and not load

Screenshots or Videos

No response

Additional Context

No response

Operating System

macOS

Operating System Version

macOS Catalina 10.15.7

Web Browser

Safari

Browser Version

Version 15.0 (15612.1.29.41.4, 15612)

Build Version

1.28.3 (535)

[Greenderella]

Hi @fascox

This seems to be duplicated from here: #1696

Our engineering team is aware of this issue. They suspect the issue is a corrupt database in the Launcher Service on MacOS, and they have already submitted a report ticket to Apple's engineering team.

As a workaround, some users reported that installing the app OnyX to clear system cache and other system junk brought the extension back after a reboot.

Other users report that installing the Tech Preview helps to make the extension appear: https://developer.apple.com/safari/technology-preview/

And another option it's to rebuild the Launch Services database as suggested here: https://discussions.apple.com/thread/251854735?answerId=253543138022#253543138022

To accomplish this, you will want to open the Terminal in the Utilities folder. Paste the following entire command line into the Terminal window, then press Return. Wait for the prompt to return before quitting the Terminal.

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

In the meantime, the team continues their investigation.

Other browsers' extension should be working fine. Maybe you could consider using other browsers until we found a fix to this issue.

We're sorry about this inconvenience, and we thank you for your patience.

[fascox]

Rebuilding Launch Services seems to fix. Closing this issue