<html><body> Popup 2 <script type="application/javascript"> var bc = new BroadcastChannel("bug646641_2"); window.onload = () => { bc.postMessage({ message: "childLoad", num: 2 }) requestAnimationFrame(() => bc.postMessage({message: "childPageshow", num: 2})); } bc.onmessage = (msgEvent) => { var msg = msgEvent.data; if (msg == "go-2") { history.go(-2); bc.close(); } } </script> </body></html>