A quote from their blog site: From Yahoo!'s point of view, any kind of signed-in customer involving with Yahoo! solutions is a valued user, whether she validates using a Yahoo!, Facebook, or Google ID.
Sign In Yahoo Mail With Facebook Account
Login to Yahoo Mail account on PC/Desktop computer system
First you need a username and password; now open internet browser from your computer/desktop. Then open web page www.yahoomail.com on it. To start their brand-new "one-click" sign-in merely click on the "Sign in with: Facebook" symbol on the Yahoo! login display. That's all you need; to get gain access to of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer
If you are a user of Mac computer then Safari have to be your web internet browser. Safari is the very best browsing solution for Mac OS; Safari is quick, faster as well as easy to use internet browser. You could easily access your Yahoo Mail account with it. See, how you can login with Yahoo mail account on Safari browser. Simply open Safari as well as type www.yahoomail.com; you will be guided to Yahoo mail sign-in web page. To initiate their new "one-click" sign-in simply click the "Sign in with: Facebook". You are then completely signed right into Yahoo!
Nonetheless, an advice- you still will not have the ability to authorize right into a mobile or desktop customer using Google OpenID.
I hope this post could help you. Thank you ...