Amazon quietly added two-factor authentication as a security option for account holders in recent weeks. Here's how to activate it.

How to add a profile on an Amazon Fire tablet Once you register your Fire tablet by signing into your Amazon account, your profile is automatically added to the device.

How to add an account to your Amazon Echo First, to create a Household, go to the Amazon Household page and click the “Add Adult” button. You can also add teens and children here.

Amazon has introduced a passkey for signing into accounts that avoids passwords and uses a fingerprint, facial recognition or a lock screen PIN.