The main Firefox Containers extension has a nicer UI but quite a lot of missing features. Mainly the ability to edit the site list directly, and the fact that t

The main Firefox Containers extension has a nicer UI but quite a lot of missing features. Mainly the ability to edit the site list directly, and the fact that the way it registers a site against a container means it can't support adding a redirect to a container, nor (related) having separate Google services in separate containers (e.g. a Youtube container and separate Gmail container).