firebase - How to replace the myApp-123.firebaseapp.com with my custom domain myApp.com

Question

I am using Firebase Auth signInWithPopup() which is absolutely great. But when initially configured, the popup reads:

Choose an account to continue to myApp-123.firebaseapp.com

I would really like it to read:

Choose an account to continue to myApp.com

How can I make the popup show my own domain?

Answer 1

Waitting for answers