BrowserVersionOwn?TypeAs String
BW1.1.0???
Chrome85.0.4183???
Edge86.0.622???
Firefox68.0.0???
Firefox81.0.0ownfunctionfunction InstallTriggerImpl() { [native code] }
Firefox82.0.0???
Firefox83.0.0ownfunctionfunction InstallTriggerImpl() { [native code] }
IE10.0.0???
Safari10.1.2???

PropertiesBWChromeEdgeFirefoxIESafari
CONTENT??? 81.0.0??
length??? 81.0.0??
LOCALE??? 81.0.0??
PACKAGE??? 81.0.0??
prototype??? 81.0.0??
SKIN??? 81.0.0??