Many apps do that, it allows the app to stay connected which (perhaps counter-intuitively) is more efficient for realtime apps. It's entirely optional though, a

Many apps do that, it allows the app to stay connected which (perhaps counter-intuitively) is more efficient for realtime apps. It's entirely optional though, and even if the app has such a notification it can be hidden. On some ROMs however, even the notification does not suffice and the app gets killed anyway. Thanks to push notifications, it still works. In any case, this is the choice of a specific implementation, and not something inherent to XMPP. Your original comment said that integration with Firebase was needed, and I wanted to point out that it is already integrated. More on the app-killing ROMs can be found at https://dontkillmyapp.com https://dontkillmyapp.com