firebase-cloud-messaging

I tried this a few times, but even updating from 3.4.0 to 3.5.0 fails for me and I have no idea why. Maybe I was just unlucky and now it will just work. :)

rpush/rpush#429
rpush/rpush#482

I would like to run multiple instances of my app on the same computer. I notice that the sender ID from FCM is the only parameter used to register a client with FCM. This raises the question as to how multiple apps on a computer (even different apps) are able to register separately from other apps. Does your library create some kind of unique ID for the app that it is running on? If not, when a Pu