Recently Normandy switched from authenticating users ourselves with boring username and passwords to using Mozilla's OIDC SSO to authenticate users more securely.
Normandy is a web service that holds a lot of influence over Firefox. Because of this, we have had a list of security features we've been working through. One of the big items on this list was to not store passwords, and do authentication of users ourselves.
We chose to use OIDC for this, primarily because it is the new hotness as far as authenticating Mozillians. It can use many sources of authentication, including Mozilla's LDAP servers, the canonical source of employee user data. This is exactly what we want to use for Normandy.