Excellent extension,The main bummer is that you have to override ALL your previous containers if you sync on a new device.

I really like the additional security provided by this add-on. The ability to easily handle multiple logins to the same website is also really useful.

Containers are a good idea. I like the warm-fuzzy of knowing that trackers are limited by Container (right?).
I truly enjoy the color-coding.
And I like the option, accessible from within the little Containers icon* that allows me to choose to group tabs by Container. That Grouping option allows me to keep newly opened tabs together.

However:
1) I need MORE colors. Eight is just not enough.
2)The option to alphabetize Containers by name doesn't flow through to Firefox Settings, and does not alphabetize when adding a new tab.
3) I tried to re-open a Google search tab that was not already in a Container, in a new Container named Amazon, but that operation failed. The new tab opened outside of a Container. The Google search tab opened as expected in a newly created Container named "Research".

I was a little concerned about the privacy of my data given the Containers' permission that says "Store unlimited amount of client-side data", but after reading https://support.mozilla.org/en-US/questions/1265089, that became a non-issue. Thanks!

Firefox is my go-to browser. Thanks for keeping user-privacy and convenience in mind!

there is no way to change the position of the containers in the plugin. created the last are always at the bottom when selecting a tab. we must have the option to change tab position in the tabs list.

I can no longer live without this.

I love this addon. It makes it so much easier to handle multiple sessions with different accounts on the same website. I have not been impressed with many of the decisions made by the Mozilla/Firefox team in quite some time but this add-on is definitely an exception to that. Great add-on!

Ich liebe es. Nicht nur, um Webseiten-Gruppen voneinander zu trennen, sondern auch für mehrere Accounts mega hilfreich. Schön einen Container mit geteiltem Prime Video Account und einen für die eigenen Bestellungen.
Möchte ich nicht mehr missen.

So great for keeping multiple accounts with the same service separate, without having to open a different web browser.

Also good for web developers who have to use the same app in different environments and not have cookies from env A get in the way of env B 👍