Opera redirects the user to Google’s OAuth 2.0 authorization server. The URL contains parameters specific to Opera, including the client_id , redirect_uri , and scope .
If you haven't done so yet, click that "O" menu, hit sign in, and unlock the full potential of your Opera browser today! opera login with google
It is critical to understand that "Login with Google" does not give Opera access to your Google data, nor does it merge your Google Chrome profile with Opera. Opera redirects the user to Google’s OAuth 2