Considering all the time we spent trying to defeat pop-ups, this is just a step back for many more advertisements. The push notifications on the mobile is already bad, especially on Android, it can get much more worse on a web browser.
> 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.
[1]: https://developer.apple.com/library/mac/documentation/Networ...