Grey square as notification icon using Firebase notifications

Question

I am attempting to integrate Firebase Cloud Messaging into my android app. But when the app is in the background or closed, Firebase notification is displayed with grey squa

Answer 1

From Firebase 9.8.0 it is possible to change this icon, by adding info about this in Manifest:

Example you will find here:

https://github.com/firebase/quickstart-android/blob/master/messaging/app/src/main/AndroidManifest.xml