title: Firebase custom subdomain www redirect to non-www
body: <p>I added CNAME for <code>my.example.com</code> and it works well, problem is with <code>www.my.example.com</code>. </p>
  
  <p>I tried to create another CNAME record for <code>www.my.example.com</code> pointing to firebase, but there is SSL Certification Warning. </p>
  
  <p>How can I redirect <code>www subdomain</code> to <code>non www</code>? Thanks.</p>