allows me to separate my cookies without worrying about contamination

It should be included by default in every browser. I only wish there was an option to synchronize my config across different computers.

Great idea, with a sleek user-friendly, intuitive execution. I found it easy to open, manage and use different containers. One missing feature that I've felt is the ability to process histories/cache's etc. within each container. e.g. "delete all history from container [shopping], but keep the other container data".
Otherwise, it's a useful add-on that helps users manage and understand their online footprint. Thanks for making it!

This is really great idea man!

Missing two main features: picking RGB colors and switching containers.

Good

Very useful for keeping my information safe. This removes the need of having different browsers open and helps maintain the cookies I use.

This add-on has much potential. Definitely 5* worthy if it had the ability to

1) store log in info in each container and
2) custom sort the container list (tab sort is of no use, at least to me).

Great to split personal and work or if you need to access same service from several distinct accounts like Google services. As Mettarefuge sayed, it would be nice to have more colors (good idea for the input).

Excellent for organization and privacy. Use it everyday

Great job. But can we have a more options for the colors? Maybe an input for RGB codes or a color picker. It would be nice :)

Works great and a it's great way to organize tabs. I would *love* if I could save a group of tabs in a container to bookmarks.

Good

This is a game changer. I loved Firefox in the past, but really had trouble coming back. The containers are amazing for many of us concerned about privacy, security, and organizing our online lives. These have made Firefox, once again, my go-to browser.

Definitely one of the indispensable extensions if you have multiple accounts on some sites like me. It works exactly as expected, fast and elegantly designed. If there’s one minor thing I still wish, it’d be showing in history which container each entry belonged to.

Great addon for those who need to access same service from several distinct accounts. (e.g. Google developer console)

My favorite part of Firefox!

Very good modulen, needed for an enjoyable web experience.
The only thing missing IMO is that we cannot change the current tab's container.

This is very helpful. My only complaint, it that when I have many tabs and then click on the dropdown arrow, the listing does not show the colors of the contains for each site like it does when the tabs are visible.

I've really come to depend on the multi-account containers. It's a much better alternative to using profiles for managing online accounts.

@Albert Kolkin:
I use it with multiple gmail accounts. The secret is to press and hold the "+" button so that you can select the container that you want to use. Then you can go to gmail.com using a bookmark for example. Since there is only one url for accessing gmail you can't use the always open the bookmark in a particular container feature like you were trying to do.

Una maravilla de extension, antes tenia que abrir diferentes navegadores, ventanas en modo en incognito pero ahora con esta no hay necesidad de eso, ya no tengo que salir de mi amado Firefox

works great for me! i just wish there was more color options for separating specific sites, like not having Ebay and Amazon on the same shopping container, but a separate one which can be recognized by a separate color