The Android push notifications through FCM actually treats the Data Messages as notification messages itself . As the interactions in the data messages are handled by the app itself, FCM’s work is just to deliver a notification and the message content.
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Push notifications for FCM
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Android mobile devices do support mobile web push notifications for users running Chrome, Firefox and Opera on their device.
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Send Push Notifications to your Android app
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Send Device-to-Device Push Notification using Firebase Cloud Messaging
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Firebase Cloud Messaging (FCM) provides a reliable and battery-efficient connection between your server and devices that allows you to deliver and receive messages and notifications on iOS, Android, and the web at no cost.
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