Latest Headless Chrome 78 user agents:

User Agent Platform Device
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/78.0.3904.97 Safari/537.36 GNU/Linux Unknown
Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/78.0.3882.0 Safari/537.36 Windows 8 Unknown
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/78.0.3904.90 Safari/537.36 Windows 10 Unknown
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/78.0.3882.0 Safari/537.36 Windows 10 Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/78.0.3882.0 Safari/537.36 GNU/Linux Unknown
\x22Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/78.0.3882.0 Safari/537.36\x22 Windows 10 Unknown
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/78.0.3904.70 Safari/537.36 GNU/Linux Unknown