Hmm, I think you're right, there may be a problem here. Unlike any other request you can trigger on a page in a browser that blocks third-party cookies, if a.te

Hmm, I think you're right, there may be a problem here. Unlike any other request you can trigger on a page in a browser that blocks third-party cookies, if a.test has <link rel=prefetch as=document href=b.test> this will send b.test's first-party cookies. This allows cross-site tracking through link decoration without having to navigate the top-level page.