Fix FireFox SLOWdown on Vista while Debugging localhost

If you use FireFox to debug on Windows Vista, you most likely have noticed how ridiculously slow it is rendering localhost requests versus Internet Explorer.  No, this isn’t a conspiracy, just an issue with IPv6, FireFox, and Windows Vista.

To fix this issue, do the following:

1) Open up about:config in your FireFox browser
2) Filter or scroll down to network.dns.disableIPv6 and set this value to true
3) Restart FireFox and you should be good to go!

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