Running FCM on IP stops Angular rendering

I need to sometimes run my app on IP for mobile testing etc, and this used to work fine in Angular 16 since firebase would just ignore IPs but now, since Angular 20, I get:

TypeError: Cannot read properties of undefined (reading 'addEventListener')

eventually failing with

FirebaseError: Messaging: This browser doesn't support the API's required to use the Firebase SDK. (messaging/unsupported-browser).

But not before it halts the whole app and stops it rendering.

This should just not do anything when it detect a none 127.0.0.1 IP as it did before, seems like there has been a regression bug somewhere.

Specifically the issue provider is:

provideMessaging(() => getMessaging()),

Commencez au point d’entrée provideMessaging(() => getMessaging()) et reproduisez le problème en servant l’application sur une IP autre que 127.0.0.1. Suivez l’échec d’initialisation qui entraîne le unsupported-browser error ; le travail est considéré comme terminé lorsque l’application continue de s’afficher sans que Firebase Messaging l’arrête dans cet environnement.

Rédigé par le modèle d'indexation à partir du texte de l'issue.