Rated 5 out of 5 stars
I have FireFox 3.6.16, and there is no the network.dns.disablePrefetch option in the about:config list.
Are you stupid, Foxtail? I think, you have the option from other prefetch extension. In any case, I'm looked into source code of this add-on, and it really prefetch DNS for all links on a web page. From the code: "// Used for <a> tag prefetch control as outlined at http://dev.chromium.org/developers/design-documents/dns-prefetching"