chrome.runtime.onMessage.addListener(
  function(request, sender, sendResponse) {
    console.log(sender.tab ?
                "from a content script:" + sender.tab.url :
                "from the extension");
    if (request.greeting == "raise")
		// send message to native messaging host
		//actually its a fake message, it only opens the ZoomRaiseHand Script
		chrome.runtime.sendNativeMessage('de.joelbaldauf.jwconfzoomhand', { text: 'raisehand' });
		});