Gmail.com was redirecting (still does) and that at the time sub-domains could share cookies with the main domain. Therefore, gmail.google.com could track cooki

Gmail.com was redirecting (still does) and that at the time sub-domains could share cookies with the main domain. Therefore, gmail.google.com could track cookies and activity via google.com. This has been fixed since then, so I think the memory of the internet is short and wouldn't understand how bad this was in retrospect. (my previous edits: Yep, I didn't want to drag this out. My memory was off on something.)