Anyone load a .xml file with no translator or stylesheets for it just to see it in the typical [+]node form and all it does it spill plain text to the screen? 3.6 did it fine, 4.0 seems to be ...

The meat of a Firefox extension is simply Javascript - the not-very-mysterious stuff of bookmarklets and regular old web pages - and a markup language called XUL (pronounced "zool.") To build your ...