I've been enjoying the containers, not just for privacy purposes, but also for easily splitting user profiles when doing testing/support.

My one piece of feedback would be that a more automated approach to choosing and opening in containers (e.g. with shortcuts) would be a great improvement.

One of the most useful add-ons ever.

A melhor opção de todos on navegadores/extensões para gerenciar várias contas. Bonito, rápido, simples e customizável.

Juste parfait... Permet de segmenter les cookies, d'ouvrir plusiers onglet vers le même site avec des identifiants différents (plusieurs boite mail par exemple).
Indispensable !!!

Essential.

Such a blessing! Especially in combination with the keyboard shortcuts add-on. Would be greater still if containers set up would sync over the Firefox profile to keep them in sync across devices!

usefull