I tried accessing the link via Firefox from down here in Australia & it worked fine. I would probably try these fixes to see if they solve the problem.
First, completely clear your Firefox caches (both memory & disk). I use
Empty Cache Button :: Add-ons for Firefox as it clears the caches & then reloads the current page without any need to restart the browser. Then try loading the page that is having problems.
If the problem persists after clearing the caches, install this addon:
Local Load :: Add-ons for Firefox. It stores the common Google jscript libraries on your local drive, so your browser does not need to request & download them every time you visit a site which requires them to load.
If you still have problems after trying the above solutions, I would recommend starting Firefox in safe mode (from a terminal run
firefox --safe-mode). That way you can see if the site loads when your addons are disabled. If it does, then you may need to remove your addons one-at-a-time until you find the one that is causing the problem.
Cheers (and good luck)