The best feature Mozilla team can offer on Firefox.
Love it.
Request - Please have containers synched between different FireFox devices.

Really useful as I sync Firefox between all computers and phones. Helps to keep work and personal life separated.

Really good. Solved my workflow issues instantly.

A must-have, very useful

Works as advertised :-)

This is so useful in a time where people have multiple accounts! The only thing that really needs to be more clear is that it does NOT work with "never remember history", because it took me over an hour to figure out why it didn't work while having all kinds of 5 star reviews!

if you have multiple accounts (work, personal, etc), this is the best add-on for you!

Great

A extensao e excelente para aqueles que assim como eu, usam certas contas para determinados tipos de atividade. Um exemplo sao aqueles que trabalham home office e tem uma conta dedicada para o uso pessoal e profissional.

No meu caso ainda personalizei criando uma aba dedicada aos estudos. Se vale como sugestao, acho que esta poderia ja vir criada por padrao.

The essential add-on for those who wish to separate their on-line personal, social and work lives.

No more juggling different login and sessions or even opening different browsers. It really works, excellent.

Works very well to keep accounts separate.

Una manera de abrir varias sesiones manteniendo por separada tu informacion personal de las otras paginas que mantengas abiertas. Gracias Firefox, siempre pensando en el usuario.

This add-on keeps my separate concerns separate. The beginning is a bit tedious, until all the sites have been configured to auto-open in the desired container, but afterwards it's a blast.

This saves me a lot of time