BrowserVersionOwn?TypeAs String
Chrome81.0.4044???
Chrome86.0.4240ownfunctionfunction MutationObserver() { [native code] }
Chrome88.0.4301???
Edge86.0.622ownfunctionfunction MutationObserver() { [native code] }
Firefox68.0.0???
HeadlessChrome81.0.4044???
IE10.0.0???
Safari10.1.2ownfunctionfunction MutationObserver() { [native code] }

PropertiesChromeEdgeFirefoxHeadlessChromeIESafari
length 86.0.4240 86.0.622??? 10.0.0
prototype 86.0.4240 86.0.622??? 10.0.0