I think the subject says it all. Code highlighting is extremely helpful, and copying and pasting into Notepad++ is a bit inconvenient. Printing straight to firebug is the ideal as it can integrate with the plethora of other firebug plugins. But code Mirror would also do the trick.
I'm not a fan of the ginormous text. I'll see if I can go in an modify that.
Oh, and is there an easy way to keep the window on top, defined from the plugin? If not, I'll get an autohotkey script to do the trick.
Thank you very much! Extremely helpful.