The site is working for me and I'm also running Win7. Can you try clearing your browser cache and also clearing your dns cache ( ipconfig /flushdns)?

i would also suggest changing your dns just to see if it makes a difference.

After the above, Make sure you are not blocking content.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop

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