A really clever, simple add-on that I'm surprised no one has ever thought of before. A lot more convenient than switching to a separate Private Window any time I don't want to be tracked.
Works especially well in combination with Mozilla's Facebook container extension too, to combat those pesky Facebook trackers.
If I have one complaint, it's that you can't directly enter a container tab by right clicking on a link from your bookmarks toolbar! You would have to do a Google search for it and then right click on the link, which kinda defeats the point of having bookmarks if I want to use Container with it. Please fix this Mozilla!
Otherwise, an excellent add-on.