If you're using Google's DNS, it will (pretty much pointlessly) validate DNSSEC records for you --- but the link between your computer and Google's DNS servers are completely unprotected (any attacker could simply trick your browser into believing there was no such thing as DNSSEC).
This doesn't much matter because only a tiny, tiny fraction of all DNS records are DNSSEC-signed. The modal experience for companies that do take the trouble to sign their DNS records is "taken offline completely by DNSSEC configuration mistakes". There is virtually no upside to participating.
The good news about all of this is that there's really nothing you need to do to have good DNS OPSEC. Just do what everyone else does, including pretty much all security people: delegate security to a higher layer of the Internet stack.