Does anyone know how to install and enable Safari App Extension? When I run containing app at the first time, I can see my extension shows up in Preferences->Extension list, but it's not 'Checked'. I have to manually check to enable it.
Legacy way to change "~/Library/Safari/extensions.plist" is not working any longer. I also tried to use profile, it didn't work either.
Safari App extensions are disabled by default when installed, you need to ask the user to enable it