Website does not open up in Firefox but does in Chrome

NationStates issue results

This is the site when I go to it it says
Hmm. We’re having trouble finding that site.

We can’t connect to the server at mwq.dds.nl.

If you entered the right address, you can:

Try again later
Check your network connection
Check that Firefox has permission to access the web (you might be connected but behind a firewall)