I also get the message ``Do you want to allow this page to open F-Secure SAFE'' with the extra annoying feature that the message disappears before I can answer it. Only if I get the time to answer it, I can proceed with safari.
Probably you do note next topic:
Strange that official response/attention is not visible. I'm not friendly with iOS-platform (or Mac?) and only F-Secure user. Maybe possible to try ask direct F-Secure Support Channels (chat as example) about this feature:
Or good to receive clarification from F-Secure team about this view.