Comment 1 for bug 1249396

I've given this some thought in the past, and without a authoritative list of SLD's, It's hard to come up with a viable solution.

A partial solution that includes "co.uk.", "gov.uk." etc etc is likely more dangerous IMO than no list at all, as users may be left believing that all SLDs are covered.

Mozilla publish a list of SLDs - Maybe we use this? I've no idea how complete it is though .. http://publicsuffix.org/