Use this method to check if your chrome screen sharing extension is installed and enabled
connection.getChromeExtensionStatus('optional-extensionid', function(status) { if(status == 'installed-enabled') { // chrome extension is installed & enabled. } if(status == 'installed-disabled') { // chrome extension is installed but disabled. } if(status == 'not-installed') { // chrome extension is not installed } if(status == 'not-chrome') { // using non-chrome browser } });