BrowserVersionOwn?TypeAs String
BingPreview1.0.0???
Chrome49.0.2623???
Edge85.0.564???
Firefox68.0.0ownfunctionfunction FontFaceSet() { [native code] }
IE10.0.0???
Safari10.1.2ownfunctionfunction FontFaceSet() { [native code] }
SamsungBrowser13.0.0???
YandexBot3.0.0???

PropertiesBingPreviewChromeEdgeFirefoxIESafariSamsungBrowserYandexBot
length??? 68.0.0? 10.0.0??
prototype??? 68.0.0? 10.0.0??