This is great in concept, however, the friction kills it for me. After adding a site to a container, whenever I now open a link of that site, I get asked whether I wanna open it in that container. Of course I do, I mean, I manually added it to that container. This only needs to be done once per site, but it's still unnecessary friction that just about tips it over to "more pain than gain" unfortunately. Please make an option to always open a given site in it's container no matter what