A quote from their blog site: From Yahoo!'s perspective, any type of signed-in user involving with Yahoo! solutions is a valued individual, whether she validates using a Yahoo!, Facebook, or Google ID.
Sign In To Yahoo Mail Through Facebook
Login to Yahoo Mail account on PC/Desktop computer system
First you require a username and also password; currently open internet browser from your computer/desktop. After that open page www.yahoomail.com on it. To initiate their new "one-click" sign-in simply click on the "Sign in with: Facebook" symbol on the Yahoo! login screen. That's all you need; to obtain gain access to of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer
If you are a user of Mac computer system then Safari must be your web internet browser. Safari is the most effective browsing solution for Mac OS; Safari fasts, much faster as well as easy to use web browser. You could easily access your Yahoo Mail account with it. See, how you can login with Yahoo mail account on Safari internet browser. Merely open Safari and kind www.yahoomail.com; you will be directed to Yahoo mail sign-in page. To start their new "one-click" sign-in merely click on the "Sign in with: Facebook". You are then completely authorized into Yahoo!
Nonetheless, a recommendation- you still will not have the ability to sign right into a mobile or desktop computer customer using Google OpenID.
I hope this post could aid you. Thank you ...