I am developing a alert notification extension using AngularJS. It fetches alerts from a REST api and shows noification (webkitNotifications). It was all good on my laptop (
The old notification API has been depreciated and now, it's suggested to use Rich Notifications. The implementation is pretty easy and you shouldn't have any problems with it.
Here is the link to the documentation: go!
You should be aware of Linux version, where rich notifications are available only in dev channel. In stable version, old API is still accessible and may cause several problems when your extension will be used across different systems.