Good idea in principle, but will only work with my email account for a week or two, then instead of opening container it throws me back to the email log-in screen. If I disable or remove this add-on, all is well.

Multi-Account Containers is a very good extension, but it could be excellent. For exemple, creating a private navigation tab/container could be great !

good!

Instead of multiple Firefox instances for different related sessions (home, work, shop, ...) you can have all sessions in one , nicely separated in tabs by the color of your choosing.

Ideal per dificultar l'extracció d'informació entre comptes i pestanyes. Perque no puguin saber per quines xarxes socials et mous, o a quines botigues compres. Perque tingueu per segur, que l'objectiu últim d'aquesta recopilació de dades, majoritariament no és per afavorir-vos, si no per cercar noves formes de mantenir-vos conectats

Instead of multiple Firefox instances (by using --profileManager switch) for different related sessions (home, work, shop, ...) you can have all sessions in one instance/window, nicely separated in tabs by the color of your choosing. Been using it for years without any hassle and/or glitches or crashes. IMHO, it should be built directly into a Firefox. Excellent!

Excellent! No more different Firefox profiles, just containers for work and personal stuff. Possibility to have a few private profiles. Easy moving tabs between containers. I wish now every extension could have possibility to have settings per different container. Great to use with Sidebery add-on.

Its a life Saving extension and the only reason why I moved back to firefox.
two things are missing which i would like to add to this.

1st there should be an option to open a url in multiple container simultaneously.
2nd the sorting or change in order of container does not get applied to context menu from where i choose reopen this tab in other container, the custom order does not shows up there

Great feature, should be standard in Firefox! Keep up the great Privacy and Security focused add-on's Mozilla! Be sure to pair this with the Facebook container add-on for best effect.
-A very happy Firefox user