On Linux, the extension icon doesn't follow the GTK theme.

Addendum 2: So, I got a new computer and I used this extensions sync feature. Regrettably, in the process of doing so my site lists for my containers were nuked. This has caused more headache for me than the privacy benefits are worth.

I'm finally uninstalling this extension.

Addendum: I didn't realize briefly turning this extension off would wipe out all my containers and settings for this extension. I turned it off for a bit since my Dad might need to use my browser for a bit and I didn't want him to be hassled by my extensions. So, I wish there had been a warning about this or a way to backup my containers and settings I've created over the past few months.

Original Review: Something I never knew I needed. Lots of user-friendly options such as being able to set a website to only ever be opened in one container. This means I don't have to first open a tab in that specific container then go to that website. Also, it's handy in preventing every social media in existence from tracking me since I've put each of them in their own container. Thank you Mozilla!

Love this add-on. It's been great with my work to keep certain sites separated from each other. I use multiple Office 365 accounts a lot for example and using these helps with the admin login persistence issues. Also helps isolate junk sites that could be intrusive.

As much as I like the feature, the plugin is buggy as hell. It sometimes forgets the tabs in a specific container for a time, then all of a sudden opens them up. Any subsequent opening of said container then doubles the tabs that were opened... The only remedy is to delete the container and recreate one. At which point we start again. For some reason this only happens on a few containers and never on others, so the plugin is still usable albeit frustrating.

It works well for always opening a specific site in a container, not sure why this is an addon instead of being part of the built-in containers though.

Excellent.
Though at the early time it might be confusing for new users.

You can lose your data. Do not trast this add-on! Very raw product.