Tagpublic suffix list

We often want to know whether two hostnames are controlled by the same person, or not. One case for that is cookie privacy in web browsers. We want pages at www.blighty.com and images.blighty.com and blighty.com to all be able to set and read cookies for each other – so a user only needs to log in once for pages or images on all of them to work well together.  So we allow all of them to...