Even if that is the case, they are effectively not. The UI has serious holes, and containers do not work with Firefox sync. I also haven't been able to find a

Even if that is the case, they are effectively not. The UI has serious holes, and containers do not work with Firefox sync. I also haven't been able to find a way to clear the cache or history for a specific container. At this point, containers are barely even useful. Putting the UI in an addon was an awful decision.