I’m happy that Safari extensions are becoming more popular again but if Steve would see the workflow of installing an extension these days some people would be shown the door.
- Install “app” from AppStore
 - Open app that is sometimes just one button
 - Safari Preference window opens
 - Enable extension in that window
 - Find small button to configure options of installed extension
 - Click on small “warning” sign on the extension icon in the menu bar to grant permissions to the extension to read the current website