Today when I logged into facebook, I saw two favicons in address bar near to the identity portion (I don't know exact name of this part. If somebody know, just edit my question) like the screenshot below;
But there is only one favicon in the login page;
Why is this so? What will be the possible reason? I use Firefox 13.0 in Windows 7.
The squared area is SSL certificate information. SSL certificate contains company information (Facebook), I suppose that Firefox retrieves favicon from the company's website address, in this case facebook.com).
P.S. it doesn't matter what "level" of answer you want to receive, each kind of question belongs to its particular domain. Moderators: please move this question as well as my answer if its possible to superuser.com