Chrome 42 Beta: Push Notifications, Promoting Add to Home Screen and ES6 Classes

The newest Chrome Beta channel release includes support for ES6 Classes and several new features that allow developers to create more immersive web applications.

This release includes two new APIs that together allow sites to push native notifications to their users even after the page is closed—provided the user has granted explicit permission. After the user has granted permission, a developer can use the new Push API to remotely wake up their service worker using Google Cloud Messaging.