BrowserVersionOwn?TypeAs String
Chrome38.0.2125???
Edge17.17134.0???
Firefox51.0.0???
Firefox56.0.0ownfunctionfunction LocalMediaStream() { [native code] }
Firefox64.0.0???
FxiOS35.0.0???
Goanna4.8.0???
IE10.0.0???
Safari4.0.0???
SamsungBrowser14.0.0???
Stargon3.9.1???

PropertiesChromeEdgeFirefoxFxiOSGoannaIESafariSamsungBrowserStargon
length?? 56.0.0??????
prototype?? 56.0.0??????