To get notification data when your app in the background, you should add click_action inside notification payload . “Put that intent-filter on your manifest, inside application tag.” you can’t put intent-filter inside application tag.
Read moreIs Firebase good for push notification?
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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