PropertiesChromeCriOSEdgeFirefoxGooglebotIEOperaSafariSamsungBrowser
length 41.0.2272 65.0.3325 17.0.0 57.0.0??? 3.0.0?
prototype 41.0.2272 65.0.3325 16.0.0 57.0.0??? 3.0.0?