问题
I have verified the Domain Name Also, have linked the A records It's been 24 Hour's since the changes have been made to DNS Records Yet the screen remains same
The app works perfectly on Firebase Default Domain.
回答1:
If anyone comes here this might help. Usually, it happens because of some kind of error during picking DNS info between the 'www.example.com' and the 'example.com'. What worked for me, is to delete the domain from the firebase console and to reconnect it back. Don't change anything on your DNS provider if everything is set correctly.
Note: This is when your domain status shows connected but you still experience the "Site not found" error
If you have problems connecting your domain, some DNS providers use "@" instead of "www.example.com" and some simply use "example.com"
来源：https://stackoverflow.com/questions/58289019/firebase-custom-domain-showing-site-not-found