Again, I do not have much to say. I use google chrome in linux and osx only, not windows. But it should work the same. You can open the javascript console in chrome and paste what you see when it attempts connection. I am sure there are other users with chrome under windows working fine.
If you happen to update fop from version 2.11 to 2.20 , be sure to clear the browser cache, if you have an old 2.11 client in cache, things will act funny.