What's in a name?

XUL

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>

<window
         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
</window>

Once upon a time, Mozilla made the decision to allow developers to extend the browser by using their XML-based user interface. It gave you access to pretty much anything the browser could do and was cross platform. You could even use it to create standalone applications. And so I did.

It's been a while now but my old and older websites still exist.