Using custom domains
yourapp.firebaseapp.comat your own domain. With the ssl certificate, you can use https: instead of http: . The process is super simple and happens in the Firebase hosting section of the Firebase console. Here’s an example – you can even set redirection of www to the naked domain here too if you want.
The dialog for connecting a domain looks like this
Next you get some instructions on how to modify the A records at your DNS provider to use Google IP addresses, so you can head over there and make those changes.