Firebase is really good to start with and easily scalable. The easy integration in applications is the best part. And with http/2, the whole ecosystem will benefit. website on Http/2 with ssl.
The best part of Firebase hosting is the free custom domain support + CDN + SSL cert. HTTP/2 is icing on the cake. Nice job!
(Disclosure: I work for Google)
This is true, but at the moment Firbase hosting only supports a single subdomain across all projects account wide... so it's not possible to have two projects on two subdomains.