Google Chrome accounts are more straightforward to use, there is no sense in discussing this.
Containers on Firefox are more useful though. They take some use to it, tabs do not sync over (Desktop) devices but enable you to make much more than just accounts. If you take privacy seriously, this is the way to go.

iz gr8t, I found good ｕｓｅ

Previously was very nice but now it sucks

It was better during the Test Pilot. So many features are missing now.

It's out of the box

I think it saves me the time to sort my tabs. The feature where I can open multiple accounts in the same browser is great to test out stuff.

Great for improve your privacy

Super zum Entwickeln!

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I can finally use various Google services without then Google following me everywhere. It's nice to have different purpose accounts completely separated. Also love that I can set websites to automatically open in particular containers.

Rempli son office : simple et vraiment très utile, que demander de plus à cette extension si ce n'est plus d'icônes pour plus de variétés ?

L'UX peut encore être améliorée et il y a des fois où c'est légèrement contraignant, mais déjà un outil utile

Great Add-On!
Just sad that it doesn't work on android.
Further suggestion:
1. Better way to modify the container settings
(basically direct access to storage.js with a nice UI)
2. Import/Export (since sync doesn't work)
3. More colors and more icons! :D

Killer feature. This made it possible for me to switch from Chrome to Firefox. I was heavy user of Chrome's profile feature to manage various aspects of my browsing history including separating my personal and work profiles which in turn included one profile for each customer I work for.

Brilliant extension - it finally allow browse safely without spilling and sharing to much data between sites. It's like 'private mode' on steroid when you are not limited to single private mode but you can have multiple private modes on per-site basis!

Great idea with serious usability issues. It's way too easy to accidentally open a new tab in the global container space. The addon should bind to Ctrl+T or provide it's own keyboard shortcut to open a new tab in the current container. Ctrl+. is too indirect. It's also annoying to have a delayed confirmation that a site should always open in a specific container after explicitly checking the "Always open in (container)" box. Finally, the "flicker" when opening a new tab that is set to always open in a certain container is bad. I think it's opening a normal tab, then closing it and opening a container tab? It's distracting and looks broken.

Isolating tabs has changed my workflow forever.

one of Firefox's the killer features.
can't browse the web without it (i have containers for Google / Facebook / Amazon+Goodreads .. anything i use daily that could share my sensible preferences has its container)

Great for separating different tabs of my work and personal projects

Though I don't know the true usage of extension, I use it to add colors on my tabs so that I can tell whether the tab is for working or gaming,etc.

Fantastic Add-on! I used to completely get rid of cookies, since they intermingled with everything else. Having them seperated is great!