I used to use different profiles, having multiple instances running at the same time was using a lot more memory and was a lot more complicated to use. So I'm very happy with this plugin, I like it that the tabs have colours. It's far from finished though. It would be nice if I can right click a link and select the container to open it in. Also if I select "always open site in this container" I don't want to be asked the next time if I'm sure.. yes I was sure otherwise I wouldn't have gone trough the trouble of selecting that option! And something has to be done about the browser footprint.. Like each container should at least pretent to have different footprints.. I give 5 stars because the idea of this plugin is fantastic, but it remains to be seen if it will actually be fantastic ;)