Flawless! I can separate the big data collectors to a large extent :)
Even stronger functionality against Google and Amazon similar to the Facebook container would be nice.

Serious usability issues. It does not reliably open the website in the proper container, even when you check "Always open in Personal" option. The reason is because there is no way to manually specify which URLs go with which container. Instead, you have to check the box after the page fully loads to tell it to always open in the current container. You cannot always tell the current page to open in a *different* container. You cannot manually write a whitelist of which URLs go to which container.

The reason this is problematic, is because oftentimes, you will get redirected from one page to another after logging in. You'll open your Social Media tab, go to the site, log in, then check "Always open in Social Media". But then the next time you navigate to the site via URL or bookmark, it will open in the standard container because the rule was made for the signed-in redirected URL, not the original URL. You can't open the original URL in the Social Media container because you get redirected immediately to the redirected URL. And you can't open the original URL in the standard container and request to "Always open in Social Media". So, you have to open your Social Media container, log out, make sure the log-in page is set to "Always open in Social Media", then log back in. What a pain!

really good but pls add more colors!

I can't imagine life without this add-on but can we please have some more colours and symbols!

There are a lot of bugs with the syncing function. Other than that it works well

Its a very good extension, works great.
It keeps my browsing separated, without the need of multiple browsers.
Es una muy buena extensión, funciona muy bien.
Mantiene mi navegación separada, sin la necesidad de abrir varios navegadores.

Funny, how there is a more popular extension just like this one, with limited functionality, tailored for facebook.
Kudos Mozilla for catching the newbs and plebs and sharing digital justice with those who are too busy to care. You guys are heroes without fame. Stay true

Almost perfect. It's just boring to open new tabs but I think that's because of Firefox limitations. I was expectating something like Chrome profiles completely separated. But for now, it's breaking a leg