How to detect a browser version for a web app?

This is what I get when using systemVars.browser while running Appgyver on Chrome.
How can I make a difference between Chrome and Safari ?

{"browserCodeName":"Mozilla","browserName":"Netscape","browserVersion":"5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36","platform":"MacIntel","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36"}