If I launch STP » Navigate to a site's login form » Invoke 1Password to fill my credentials, Safari launches and my Login item doesn't fill in Safari Technology Preview. Why?
11 Answer
Currently, in order to use 1Password (or any Safari App Extensions) with Safari Technology Preview, STP needs to be set as your default browser:
Click the Apple menu in the top left corner of your screen » System Preferences » General. Then change your Default Web Browser to Safari Technology Preview.
You can follow this thread in the 1Password support forums if you're interested in learning more:
[1Password Support Forum - Safari Technology Preview]
