It's a very simple extension, and the shortcuts work well and do what you'd expect. The source code is fairly small and easy to read through and verify.

This is the one of the great extensions. However I remember I could assign my own shortcut, but I can't find the way to do it. It's a shame. Anyway good :)

It really makes managing containers easy. Thanks!

So glad that this add-on exists. Thank you Gabriel!

Does exactly what I need it to do, and it does it well. Great extension

Absolutely love it. Love containers and FF. This and Sideberry are my two main reasons for staying with FF