Does firebase handle push notifications?

Question

I am investigating whether firebase and angularfire are a good fit for my upcoming project.

One of the requirements are for users to be notified when the app is clos

Answer 1

The answer is YES!

At 2017 Firebase published Cloud function. You can use a database trigger to send a push notification (using FCM) even when the app is closed.

I have created a tutorial for firebase cloud function and Xcode(iOS) if you're interested, for the javascript it's the same code: https://www.youtube.com/watch?v=jOJdlvMS6KA