I've used this from the days of it [1] being in Test Pilot (an add-on for experimental features) [2] and really loved the idea. Usually I'd use a couple of diff

I've used this from the days of it [1] being in Test Pilot (an add-on for experimental features) [2] and really loved the idea. Usually I'd use a couple of different browsers or shuttle between normal and private browsing/incognito modes for using multiple logins on services (from a privacy standpoint, I don't like linking accounts together on any service, like for example how Google allows users to do). I did provide feedback to the developers on the following: 1. Opening new tabs should have better intelligence about which container a user wants to go with. 2. Improving the look of the tab bar for better tab visibility and clarity on which tab was the current one. 3. Detailed and clear documentation on how containers work across normal windows and private windows, because I certainly wouldn't want to use something believing that it's providing me isolation while it does not in certain scenarios. In my limited knowledge, the behavior of different browsers, in keeping cookies/storage isolated, in private/inprivate/incognito mode varies when it comes to multiple windows, multiple tabs and closing windows/tabs. That is already not clear enough (to me) that I don't open more than one private/inprivate/incognito window at the same time. I would love for this to get into Firefox main instead of being an extension! [1]: https://testpilot.firefox.com/experiments/containers https://testpilot.firefox.com/experiments/containers [2]: https://testpilot.firefox.com/ https://testpilot.firefox.com/