As i know, Chrome limit 6 connections per server. It mean we run multi-thread 30 for same an url (server) just have 6 threads real working, other threads are waiting
I hope admin can do it with the Chrome in software Bablosoft on next new version
If you are a coder. U will understand that. Firefox allow user raise . But Chrome cant. Google limit 6 on Chrome. If u can raise it in "Brower Auto Studio" It will make work faster