A quote from their blog site: From Yahoo!'s point of view, any type of signed-in customer involving with Yahoo! solutions is a valued customer, whether she confirms using a Yahoo!, Facebook, or Google ID.
Facebook Yahoo Sign In
Login to Yahoo Mail account on PC/Desktop computer system
First you need a username and password; currently open web internet browser from your computer/desktop. Then open page www.yahoomail.com on it. To launch 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 get access of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer
If you are a customer of Mac computer then Safari need to be your internet internet browser. Safari is the very best surfing solution for Mac OS; Safari is quick, much faster and easy to use internet browser. You could conveniently access your Yahoo Mail account with it. See, how you can login with Yahoo mail account on Safari web browser. Merely open Safari as well as type www.yahoomail.com; you will certainly be routed to Yahoo mail sign-in web page. To launch their new "one-click" sign-in simply click the "Sign in with: Facebook". You are then fully authorized into Yahoo!
However, a suggestion- you still won't be able to sign right into a mobile or desktop computer customer making use of Google OpenID.
I hope this write-up can assist you. Thank you ...