why Does “navigator.userAgent” in javaScript returns the String “Mozilla” when tried in a google chrome borwser?

Question

Im developing a javaScript code and I want to determine the version and brand of the client\'s browser, here\'s the piece of code I\'m using to do so :

var bro         


        

Answer 1

For historical reasons, nearly all browsers (except Opera) prepend Mozilla/ to their user agent.

For example, here are some common user agents:

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/534.30 (KHTML, like Gecko)
            Chrome/12.0.742.112 Safari/534.30                    # Chrome 12
Mozilla/5.0 (X11; Linux x86_64) Gecko Firefox/5.0                # FF 5
Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US)        # IE 9
Opera/9.80 (Windows NT 5.1; U; en) Presto/2.8.119 Version/11.10  # Opera 11.10

For a detailed list, refer to online databases.