DNSUnlocker ads in Firefox

I'm getting bombarded with ads in my browser "Brought to you by DNSUnlocker".

This seems to only be effecting one site, and only in Firefox. The site however is a local development version of a site I'm building. If I use a different browser, or a I use "Private Browsing" in Firefox it doesn't seem to happen. I'm fairly sure the source for my site is not corrupted. I'm fairly sure this is just a DNS, or Firefox issue.

I'm using google public DNS, and the settings still seem to be correct. I've checked my hosts file, and this is fine.

Any idea where this could be coming from?