agent=Mozilla/5.0 (Windows NT 6.0; WOW64; Trident/6.0; rv:11.0) like Gecko custom1=custom1 custom2=custom2 more=otherstuffi dont care about etc

agent=Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko

agent=(.*?=)

agent=Mozilla/5.0 (Windows NT 6.0; WOW64; Trident/6.0; rv:11.0) like Gecko custom1=