Thanks for letting me know. I actually was just thinking about that the other day. Anyhow, I just released an update which will allow you to Open a link in a New Window. Please let me know what you think.

Bravo! Working like a charm - online. Under dev conditions on local PC (XAMPP/Firefox) 'Open in new window' function is not working, but that is not serious problem for me.
Your addon is excellent solution for opening PDF files in separate windows. Maybe you can ad this funcionality also to file links?