It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
This Connection is Untrusted You have asked Firefox to connect securely to login.yahoo.com, but we can't confirm that your connection is secure. Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified.
Originally posted by TheLieWeLive
How are you getting to your sign on page? Through a link or bookmark or do you manually put in "www.mail.yahoo.com"? If your not doing it manually maybe your using a mirror or something to link to yahoo mail and Firefox doesn't receive a certificate. Just a thought.