Options of a PushSubscription
You can now access the options used when subscribing a user to push.
Web Push Interoperability Wins
Web push has had a few updates in recent versions of Chrome. GCM now supports the web push protocol and if you use VAPID you won't need to sign up for a Google Developer Project and you'll be given an FCM endpoint.
Web Push Payload Encryption
Web Push now supports payloads! Find out how to take advantage of this powerful new feature.
Notifying you of Changes to Notifications
2 new API's have been added in Chrome 44 which makes using Notifications with push easier to work with and customize.
Push Notifications on the Open Web
Push Messaging and Notifications are Landing in Chrome 42.