Hello guys!
I have installed this extension: https://addons.mozilla.org/pl/firefox/addon/temporary-containers/
And I want to set it to delete history, cookies etc… After I close the tab (for example for banks’ sites). In settings i checked box, delete history, but it dosen’t work.
The next problem and as i suppose linked with the firs problem is… I dont know how to delete temporary containers. Even if i close firefox, and turn it on again, old containers are exist 
Anyone can help me? Thanks!