It's fantastic and it get's five stars just for being this awesome, but I do have improvements. 1.) Let this be a default feature in Firefox, but make an advanced category for activation for some features so novice users don't get confused. This is to prevent fingerprinting from plugins. But do not hide it away in the config. 2.) Let us be able to chose different default search engines for containers. I have many containers, and some I would like to use DuckDuckGo in as default, and others Google.