The new beta also includes HTTP Strict Transport Security (HSTS), which lets websites demand that Firefox always use a secure connection when visiting. “Firefox 4 Beta now remembers what sites use the HSTS protocol and will only connect to those sites using SSL (Secure Sockets Layer) in the future, helping to prevent ‘man in the middle’ attacks,” Beltzner says.


My thought was that if we DO add comments but those comments will never be seen, then the thread is becoming obsolete - but I DO see YOUR point, TimeWaster.
It could also mean bing is not google