Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.20 Safari/537.36 OPR/15.0.1147.18 (Edition Next)

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.20 Safari/537.36 OPR/15.0.1147.18 (Edition Next)

That’s the User-Agent string for the Opera Next preview. I couldn’t add any comments because it fills the whole tweet.