New Alexandria creates straightforward, obviously prudent enhancements to containers. Their extensions provides more thorough coverage, particularly for cookies that aren't obviously relevant to containers.

Good or bad, ABC is widespread in its functionality. If you like that, then you wouldn't want any container. Otherwise, there's no reason not to have this extension

This and another New Alexandria extension has worked without any problems for me for five years.

This extension does what it says, but is also a big pain the the b*tt. When I search for something on google and I click on search result, it takes me to that result, but it also clears out search and I can't go back to see other search results. I know that this is by design, but instead of clearing out Google results, how about opening clicks in new tab or new window, so I can still go back to search results and not have to re-search 10,000 times for the same thing over and over.

Causes issues with Google login on Udemy. Still a great add-on.

Causes issues if Facebook container is installed. If FB Container is installed, Firefox will open two tabs when visiting a Google owned site.