Reference links not working Rated 4 out of 5 stars

I think this is a great extension!

The one thing is that the links for more information or references don't seem to work for me. Is it because I am behind a firewall? I am able to go to the directly but through clicking on the links. When I click on a link nothing happens.

Thanks again!

This review is for a previous version of the add-on (1.1).