Comment by sdk-

Yes. Containers will be enabled by default in the regular release without the need to install the extension or flip a preference in about:config.

It's also planned to integrate the ability to assign a website to a specific container. There's no information available on the other extra features from Multi-Account Containers like VPN/Proxy per container for the moment.

You can follow the development on bugzilla https://bugzilla.mozilla.org/buglist.cgi?component=Container...