I cannot log in to Stack Exchange chat.

If I check the Login help page, I get the following error.

Test 5: Communication with stackauth.com – failed

• IFRAMEs – ok
  
• Referrer – ok
  
• JavaScript – ok
  
• Storage – ok
  

We were not able to communicate with stackauth.com. Please make sure that you allow embedding of <iframe>s from remote sites into web pages, and that you allow this site and stackauth.com to communicate with each other.

I use Firefox 8 with NoScript and RefControl extensions, so I guess I have somehow to appropriately set referrers.

Update:

I have tried to enable and disable those two extensions in combination:

• If RefControl is enabled, regardless of activation status for NoScript, the result is as described above;
• If RefControl is disabled, regardless of activation status for NoScript, the result for referrer check is KO;

How do I fix this problem?

Is it possible to login to chat with Firefox 8?