Test Navigator properties.

typeof navigator: object
navigator: [object WorkerNavigator]
navigator.appName: Netscape
navigator.appVersion.indexOf('WebKit') != 0: true
typeof navigator.platform: string
navigator.userAgent.indexOf('WebKit') != 0: true
typeof navigator.onLine: boolean
navigator.appCodeName === 'Mozilla': true
navigator.product === 'Gecko': true
DONE