I was browsing my history and I noticed that one of the entries said, "data:text/html,<script>window.close();</script>" Does anyone know what this is? I clicked on it and it was a blank page. I do remember being redirected to 'www.idwaneo.org" which apparently looked like some app site. I clicked on a link in that app site and all of a sudden mackeeper popped up or something. However in my history there is no history of mackeeper it only shows that idwaneo site and that data:text entry. Is this dangerous?