Firefox 141 on Android often crashes with:

java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.tasks.Task.addOnCompleteListener(org.mozilla.fenix.components.PlayStoreReviewPromptController$$ExternalSyntheticLambda0)

What is #Firefox#Fennec (via #FDroid) using Google Mobile Services for?