> That's using the referrer header to detect if you clicked a link to their site from this domain. Totally different box of frogs altogether. No, that's what t

> That's using the referrer header to detect if you clicked a link to their site from this domain. Totally different box of frogs altogether. No, that's what they used to do until HN got updated to put rel="noreferrer" on the links specifically to stop that. > Unless they're also doing some CSS stuff I haven't read about. That's exactly what they're doing now. They have white-on-white text at the top of every page that turns red (i.e., becomes visible) if you've ever visited the HN submit page.