Imported a project from Google Cloud Console (App Engine) into firebase new console and trying to run from localhost shows the following error.
iframe.js:84 Uncaught Error: This domain is not authorized for OAuth operations for your Firebase project. Edit the list of authorized domains from the Firebase console.
localhost is already added to the list of authorized domains in firebase console, what am I missing?

I'm using polymer, so my setup looks like this:
<firebase-app auth-domain="<my app>.firebaseapp.com"
database-url="https://<my app>.firebaseio.com/"
api-key="<my key>">
</firebase-app>
<firebase-auth id="auth" user="{{user}}" provider="google" on-error="handleError">
</firebase-auth>