Test Navigator properties.

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