OctoSSO is a web browser extension that enables GitHub's single sign-on. It helps you login to any GitHub account automatically by taking care of the business end of the SSO process.

After you install the extension on your browser, you will be shown a list of your organizations. Select one, and the browser will automatically click the sign-in link and login you to your account.

What's the purpose of the OctoSSO extension?

Single sign-on (SSO) is a feature that allows a user to sign in with one account and access their services on other services. It's the process that enables a user to login to a site and have the web service recognise them as the user they are logged in to the service.