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[FIXED] Firefox can't establish a connection to the server at localhost:8080.


I'm using Sabnzbd which only has a WebGUI. The WebGUI is located at http://localhost:8080/sabnzbd/ by default. And does load - completely without errors - in Internet Explorer 9 and Google Chrome 10. But when I try to connect using FF v4.0b7, the "Unable to connect" error message comes up. No difference whether I use safe mode or FF v3.6.13

Am I doing something wrong?

Modified by DcR-Tr4x

Additional System Details

Sites Affected



  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7) Gecko/20100101 Firefox/4.0b7

More Information

Helpful Reply

Ten people with the same problem.. Anybody who can shed some light on this issue? It's still there in 4.0b8. Thanks in advance!

Question owner

OK, the SABnzbd forum pointed me in the right direction. Firefox was using the IPv6 version of localhost. This meant that I had to browse to http://[::1]:8080 instead of http://localhost:8080

I'm still at IPv4, so leaving it this way would be annoying.

However, this can be fixed. Just follow these steps:

  1. Type about:config into the address bar
  2. Ignore the warning
  3. Enter network.dns.disableIPv6 into the filter box
  4. Right-click on the entry and press on toggle (it should now say false)
  5. Close and restart FireFox

Now just enjoy SABnzbd again! :)

Modified by DcR-Tr4x