From the "Notification Programming Guide for Websites"[1]: > Opting In to Notifications > > Users must opt in to receive notifications. The opt-in

From the "Notification Programming Guide for Websites"[1]: > Opting In to Notifications > > Users must opt in to receive notifications. The opt-in process only occurs > once per domain. The presentation of asking for permission is identical > for all website notifications. In fact, the permission policy that > a user chooses for push notifications applies to local notifications. It goes on to say that "users can adjust their notification preferences in Safari preferences and System Preferences". [1]: https://developer.apple.com/library/mac/documentation/NetworkingInternet/Conceptual/NotificationProgrammingGuideForWebsites/UserExperience/UserExperience.html#//apple_ref/doc/uid/TP40013225-CH10-SW7 https://developer.apple.com/library/mac/documentation/Networ...