I believe this will solve a lot of the problems that Facebook has been having.

Worked when I installed it, stopped the next day, maybe due to Nightly installing an update. The container is still there, but it do not open facebook inside it (I am still not logged in outside the container though). I can then manually open the container and open facebook where I am then still logged in

Would be better if i didn't have to log in every time i reload the window.