You can assign a container to specified website(Which multi account container still CAN'T). So your container changes when a website does not assigned it. To do that enable "Match domain only" and "Default container" option in addon's setting. You can use this rule "!sitedomain.*"(without quotation) assign any site to container. Example if we assign google's domain to google domain we should assign "!google.*" rule to Google container.
Bad thing is addon owner is not active well so it's not frequency updated. There is fork called "bifulushi" that updated frequently and has active development.

Awesome, this is the only addon which allows you to manually write domains, not open a lot of subdomens to add each one.
But 'temporary' containers are the strange feature, it's not completed for use.

Its a best help, functions have perfection. Thank you

Great job with this extension. Deeply grateful for the lists provided in the comments below. I think I'd like to have a separate container for when you create a "new tab" that could be different than the "default container" which I've enabled in the options.

This is one of my favorite add-ons. Miles better than the Multi-Account Containers! Really wish there are rules for links inside a container though.

Very nice add on, thanks a lot for this open source work.

need a documentation and examples. I don't understand how regex work. The "default" mus be setted and more generic: subdomains and tld, ex. you typically need catch amazon.com www.amazon.com amazon.co.uk etc.

Great addon! Keeps certain accounts isolated on different domains

Latest Firefox 72.0.1 for Linux Mint broke colors for different containers.

Very useful addon, adding custom rules in text form is a million times better than whatever "Multi-Account Containers" is doing.

However, the "Basic mapping" rules added by this addon do not work, at all. Example: if you go to https://www.nexusmods.com/ site, then click + in addon settings, it will add an "www.nexusmods.com" rule. It doesn't do anything. If you then go to "www.nexusmods.com", it opens not in a container.

Essential tool. Interface is not absolutely perfect. 4.49 stars.

Don't know if the Dev reads the reviews but here's mine. I like this extension a lot, nothing wrong and keeps accounts for example YouTube in its own container, however I have multiple accounts on YouTube mostly for a fresh start away from my main one as its sub box is crowded. When I set YouTube for its container and open another container (I.E. Personal) I want to be able to have that container be exempt from the rule I set for the YouTube container so that it doesn't just change the container to the YouTube container I set.

Totally works, but does not put colored line on tab. please enable the colored tab :)