Excellent addon! It's a must-have.
One question: is this extension useful for someone who doesn't use facebook? I recently deleted my facebook account, and I wonder if I still need this. Do facebook trackers also collect data from unsigned users?

I have been using this since it first came out. From what I can tell, it has worked great with no problems. Now, in late August 2020, after allowing the new Facebook interface to take over in my Facebook, I found that the new Facebook look/interface does not play nicely with Facebook Container. My Firefox eventually freezes as does everything on my computer. As soon as I disabled Facebook Container, everything worked again. Hopefully this issue will get fixed soon.

Great concept, but it breaks Facebook Workplace (won't sign in) so I cannot use it. Needs the option to whitelist domains, perhaps.

is ok

So far, so good....I haven't had any issues with this extension - innovation like this is so important to allow us to take control of our own data. Thanks Mozilla - keep up the great work you're doing.

Занёс случайно в этот контейнер ссылку на сайт https://yandex.ru/ . Теперь этот сайт ВСЕГДА открывается только в этом контейнере. Ссылка в меню контейнера не видна. Переназначение другого контейнера не происходит. Отключение контейнера не помогает. Помогло только удаление и повторная установка. Влияние контейнера Firefox Multi-Account Containers на описанную ситуацию не проверялось. Однако этот контейнер на всякий случай тоже был переустановлен.