your firewall settings and/or hosts file.

the first website has a fix.

Outfoxed - A Solution to the Firefox Bug
We finished a major update, and their are a few changes worth noting. The most obvious change is the addition of more then 30 new channels, and the repair/revision of all previously reported channels. Also, as mentioned in the previous post, we have incorporated our solution to the bug in Firefox that caused the browser to crash when changing channels. Our fix is not foolproof, but so far it's the best that we've been able to come up with on our end (again this is a bug occuring in Firefox). You should now be able to change channels in Firefox, however if problems persist please contact us with any information you can provide us.

As for the second one, I went there without any problems. It could also be blocked with your router settings.


Rick