Marco's answer is right,

I was facing the same issue as you and if you change

if (__DEV__) {
    firestore().useEmulator('localhost', 8080);
    storage().useEmulator('localhost', 9199);
-   auth().useEmulator("http://localhost:9099"); // from this
+   auth().useEmulator("http://127.0.0.1:9099"); // to this
}

Then i suggest to rebuild the app and log out of your app.

You will be able to see something like this in the console