Firebase hosting not validating TXT record in GoDaddy

To add a bit more information to this great solution for future reference.

DNS propagation can be monitored using a service like: https://www.whatsmydns.net/ This will show you when your records are ready, thus can be verified by firebase.

As for subdomain, ie. beta.example.com

The value would be 'beta' instead of '@' or 'example.com' for the godaddy DNS records.

Per my comment above, the solution was to use the @ sign in the Name column of GoDaddy, not the actual name of the domain that is owned.

TXT GoDaddy TTL time is approximately 2 hours, Please re-verify after 2 hour firebase.