This add-on is very helpful for two use cases. First, if you have multiple accounts on the same service (for example, personal and work Github accounts) and you want to be logged in simultaneously in all of them. Second use case is when you want to isolate your accounts: for example, I log in to my bank account in the 'Banking' container, and for the Facebook I have a custom account, in which I logged in only to Facebook and Instagram.

Great for keeping Facebook & Shopping site snooping contained.

Great addon. I use separate containers for social networks and google, for job and for personal usage. Facebook/google trackers are on almost every page, and I don't want my web surfing to be tracked and recorded.

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This is an amazing feature, keeps my business separate from my day to day activities from banking from social media etc.
A separate container for every social media network and account. If I can't stop them I'll make sure to give them hell xD

Very usefull.

One of the best ideas for browsers! Would be great if tabs automatically opened specific tab containers for specific domains

Excellent

This is so useful if you don't want certain sites to communicate with each other in your browser. Would be nice if they made it easier to switch containers without needing another addon for that.

Great for Privacy tho

It has been my favorite Add-On but suddenly today it started to load very slow the list of containers after pressing the button.

In my search to replace chrome I had the hardest time finding a replacement for having multiple profiles. This add on works under a different paradigm than the profiles in Chrome, however, once I got used to the way it worked I'm finding it to be a proficient replacement for that feature. A few tweaks or additional settings would be nice but otherwise containers are fantastic.

Truly a must have! I use it in combination with "Simple Tab Groups" and couldn't be happier.