Mozilla has started supporting two-stage authentication for Firefox accounts. Until now, users could only secure the account that the browser uses to synchronize data with a password.
Users also get codes to restore access to the account if they can no longer access their authentication application. Mozilla advises users to keep those codes in a safe place.
Firefox users can enable two-stage authentication in the settings of the browser. If no option appears under Account Management, it is possible to add “& showTwoStepAuthentication = true” to the url to have the option appear.