mail.google.com identity doesn't match

I got

This website doesn't supply identity information

in firefox while browsing gmail.com, I understand that would be because I understand it is required when it needs to load content using HTTP and HTTPS as explained in this post

however when I check most possible scenario to make gmail load contents (from attachment, from profile pictures, loading mails, loading ads, gtalk embedded voice call, hangout), everything is transferred over HTTPS, no HTTP is used

now if I check the fingerprint supplied via the site consumed by Firefox it is

and when I check the identity by using http://ift.tt/1dDrvIB, I get different fingerprint

is my understanding correct ? if so why do I see different finger print ?