[LukeWalsh]

The Firefox Multi-Account Containers is a more general extension that allows you to create containers and determine which sites open in each container. This extension can be customized to suit your needs for multiple sites and multiple logins but takes more time to set up than Google Container.

[toastal]

Exactly. It's easy to tell a privacy-unsavvy person to install this and the Facebook-only container rather than explaining how to containerize and set up all the specific URLs and what the broader concept means. The multi-account container is pretty cumbersome to set up despite being easy.

[inferiorhuman]

The facebook-only container is really slick. If you go to facebook.com or instagram.com it'll replace the current tab with a FB container automatically.