Latest Avast Secure Browser 4 user agents:

User Agent Platform Device
Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909 Windows 8 Unknown
Mozilla/5.0 (Windows NT 6.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909 Windows 8 Unknown
Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909 Windows 8 Unknown
Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909 Windows 8 Unknown
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909 Windows 7 Unknown
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909,gzip(gfe) Windows 7 Unknown
Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909 Windows Vista Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909 Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36 ASW/4.58.2552.909 Windows 10 Unknown
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.13.0 Version/16.0 Safari/605.1.15 Mac 10 Unknown
Mozilla/5.0 (iPhone; CPU iPhone OS 16_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.13.0 Mobile/15E148 Version/16.0 Safari/605.1.15 iOS 16 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 16_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.9.0 Mobile/15E148 Version/16.0 Safari/605.1.15 iOS 16 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 16_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.9.0 Mobile/15E148 Version/16.0 Safari/605.1.15 iOS 16 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 15_7_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.13.0 Mobile/15E148 Version/15.0 Safari/605.1.15 iOS 15 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 15_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.7.0 Mobile/15E148 Version/15.0 Safari/605.1.15 iOS 15 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 15_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.7.0 Mobile/15E148 Version/15.0 Safari/605.1.15 iOS 15 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 15_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.4.1 Mobile/15E148 Version/15.0 Safari/605.1.15 iOS 15 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 15_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.13.0 Mobile/15E148 Version/15.0 Safari/605.1.15 iOS 15 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.1.0 Mobile/15E148 Version/15.0 Safari/E7FBAF iOS 15 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 15_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) AvastSecureBrowser/4.0.0 Mobile/15E148 Version/15.0 Safari/605.1.15 iOS 15 iPhone