Extremely useful and works like it says it does.

Расскажу позже!!!

this is really great if i need to manage multiple account of same websites

This Add-on is Excellent, I think it should be embedded on Firefox. I discovered this extension by chance.

Containers is simply amazing for the work that I do. I maintain electronic accounts and services (web, email, domain, etc.) for many different clients. Before containers, I would often need to either log off one account to log on as another, or open several private tabs. Now I keep one container for each client, meaning cookies and session info stay present. Whenever I need to make a change, I simply open that client's container, head to the right service, and everything's already logged on and ready to go. I only wish a) there were more icons to choose from, and b) there was a way to sort container names (not the container tabs, but the container names themselves) in the GUI. But if you handle multiple accounts for the same web sites, this add-on is a godsend.

L'option permettant de lié le site à un conteneur est très pratique.

Must have extension in this day and age.

This one has become a must have. No way I can manage the daily routine without it now.

Helps me visit otherwise privacy intrusive web services.

dùng tiện ích

A very useful extension.

I never knew I needed this until I used it. This is by far the most important (and practical) extension I have come across, especially if you have separate email accounts for work/home/etc.

Finally I can use multiple accounts instead of openning incognito mode or using other browsers.

Sadly, it still does not support right-click from bookmarks bar.

Easy way to sandbox different accounts. The ability to keep personal, work and other sites separate from each-other is awesome.

super pratique!

Now Office 365 using multiple accounts is not painful to manage on a daily basis.

Best thing to happen to Firefox since the Private Tabs addon doesn't work anymore! It's a bit complicated to make the addon learn the domain rules. But it works. Combine it with the addon Cookie AutoDelete! That basically gives you private tabs instead of having to open private windows.

Great extension!

It's so good, it's literally one of the biggest reasons why I use Firefox over Chrome.