For Google Authenticator and Battle.net Authenticator.
BACKUP YOUR SECRET! Don't wait until it's too late!
This extension is also a QR code reader. Your data will be auto sync with Google Account if you have logged in.
To guys who want this extension buyout: this extension has a very strict content security policy, it is impossible to insert any ADs into the extension to make money, so please DO NOT write emails to me any more.