[doubleukay2]

"SRV records dont store IP addresses, they store names. So the browser does a SRV req, orders by priority and weight, picks one, then does an A lookup and attempts connection."

Not necessarily in this case. The DNS server can provide the A record in the Additional Section. Lookups returning hostname-based records e.g. MX/NS/CNAME records benefit from this too. Until it exceeds the UDP reply size limit of course.

But if a SRV record doesn't exist, then the result of an A lookup needs to be used. That A lookup is done sequentially or in parallel (think of how dual-stack browsers handle of AAAA/A lookups).