A quote from their blog: From Yahoo!'s viewpoint, any type of signed-in customer engaging with Yahoo! solutions is a valued customer, whether she confirms utilizing a Yahoo!, Facebook, or Google ID.
How To Login Yahoo With Facebook
Login to Yahoo Mail account on PC/Desktop computer system
First you require a username and password; currently open internet internet browser from your computer/desktop. After that open page www.yahoomail.com on it. To launch their new "one-click" sign-in merely click on the "Sign in with: Facebook" icon on the Yahoo! login screen. That's all you require; to get gain access to of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer
If you are a customer of Mac computer after that Safari have to be your internet internet browser. Safari is the very best surfing option for Mac OS; Safari is quick, quicker and also easy to use 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 as well as kind www.yahoomail.com; you will be guided to Yahoo mail sign-in web page. To start their new "one-click" sign-in merely click the "Sign in with: Facebook". You are then totally authorized right into Yahoo!
Nonetheless, an advice- you still will not have the ability to sign into a mobile or desktop client making use of Google OpenID.
I hope this post can help you. Thanks ...