This effort, container tabs, seems to be off to a good start. Missing though is that there seems to be no way to verify that container tabs are actually isolated from each other. Also, what advantage is there, if any, to have a window that only contains a single container type , such as "Personal" over a a private window containing the same number of tabs with the same content, where the tabs are not allowed to be container tabs. The container tab idea is great but more documentation and proof of their effectiveness would make them more useful.