This addon is extremely useful, it is similar in concept to private browsing but expanded upon as to allow saving data between sessions and contextual sessions for specific sites. It allows you to keep work, hobby and social separate for example. I use it all the time, and browsing without it would be a severely lacking browsing experience.
The only downside is that the UI for preferences is not as transparent and user friendly as I would like.

Great extension. Highly recommended. Another tool in the privacy tool belt.

Has big potential, but assignments need improvement. at least sync to Firefox Sync, support for top domains and possibility to edit assignments as text file.

Really helpful for managing multiple accounts with any apps/services you might use. I use it with AWS. Love this add-on!

Excellent

Works like a charm, much more convenient than having multiple profiles in Chrome.

is now really part of my way of working with Firefox. vital to separate work/personnal or banking/gaming accounts.

As a developer, I have found for myself a new use case for containers. I make different containers (eg. dev1, dev2, etc.) and use them to maintain different user sessions in each container while I'm testing my app.

Only thing that is missing (I think) is a quicker way to open certain containers, for example open all tabs in a bookmark group (eg. work related bookmark group) into a particular type of container (eg. work container)

Great way to compartmentalize your different uses on the internet. I use containers for emails, banking, shopping and alternate email accounts. Great feature.

It works as intended. No bugs found.

I would like to see an option in the add-on that allows a "quick toggle" for when people click the + symbol for opening contained tabs faster, rather than press and hold.

Perfect, but really needs firefox sync

This addon is great! It should be included into Firefox.
And as repeated by alot of people already: It would be so much better if the container settings were Synced between devices... Or at least give us a way to import/export them easily

But it's definitely the biggest reason for me to use firefox, after many years of Chrome

Indisposable. Feature that converted me from Chrome. I really wish there was a sync for which sites open in which containers by default though.

Having recently moved to Firefox from Chrome (since Google messed with the multi personality settings) I was overjoyed when I saw this plugin.

It seems to do exactly what it says on the tin .. the only downside I can find so far is that it doesn't seem to sync between machines, so all the preferences need to be manually copied from laptop to desktop / etc .. which is a bummer.

Would be 5 stars if only the profiles sync'd along with everything else through Firefox Sync

ME ENCANTA ES EL MEJOR DEL MUNDO,LE DOY 5 ESTRELLAS.