Accounts on addons.mozilla.org (AMO) are integrated with Firefox Accounts, which lets you manage multiple Mozilla services from one login. To prevent unauthorized people from accessing your account, even if they obtain your password, we strongly recommend that you enable two-factor authentication (2FA). 2FA adds an extra layer of security to your account by adding an additional step to the login process to prove you are who you say you are.
When logging in with 2FA enabled, you will be asked to provide a verification code from an authentication application, in addition to your user name and password. This article on support.mozilla.org includes a list of supported authenticator applications.
Starting in early 2020, extension developers will be required to have 2FA enabled on AMO. This is intended to help prevent malicious actors from taking control of legitimate add-ons and their users. 2FA will not be required for submissions that use AMO’s upload API.
Before this requirement goes into effect, we’ll be working closely with the Firefox Accounts team to make sure the 2FA setup and login experience on AMO is as smooth as possible. Once this requirement goes into effect, developers will be prompted to enable 2FA when making changes to their add-ons.
Once you’ve finished the set-up process, be sure to download or print your recovery codes and keep them in a safe place. If you ever lose access to your 2FA devices and get locked out of your account, you will need to provide one of your recovery codes to regain access. Misplacing these codes can lead to permanent loss of access to your account and your extensions on AMO.
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