
Sanitisation???
I think the issue is that:
"Google Account (https://www.google.com)'' Certified by Verisign: blahblah click ''Certificate"
is a VALID realm! ( I think...)
Firefox SHOULDN'T sanitise this... Although FF could display things a little better to make it clear which site you're giving details to.
But imho FF hasn't really got a security bug; more of a layout/clarity issue.
:)