I actually solved this problem with the simple solution of going back to an older Windows restore point but I'm curious about what was going on and causing the problem. I did a Google and got a hit on the Firefox website about it but the solution was simply to upgrade to a new version of Firefox. I'm a little more curious to know if anyone knows exactly what was causing the problem. The problem was that all of a sudden Windows xps writer would no longer print from a Firefox website to an xps document. Both firefox and the xps writer would stop responding. From what I've read it has something to do with how the two are communicating but I could find no details as to exactly what the causes the hang up. Anyone out there have any idea? Mostly just trying to satisfy a curiosity here. Thanks.