I appreciate this extension's purpose. Unfortunately, it adds a bright white line at the tops of a tab where a container is being used—and when using a dark browser theme, this makes it appear like the active tab, which is pretty distracting. Couldn't you put a little symbol at the right side of the tab, or do any other kind of marking?

I'm sorry, but this extension seems the reason why i asked to changed password, causing i can't login on multiple device that using facebook container

It's good to have something to stop trackers like Facebook. It should also be for other trackers.
The problem is that is breaks websites even if it appears to be disabled on the top bar. The Instagram feed on my website failed while it was working on Chrome, and it doesn't tell me that it was blocking it.
That is a problem for visitors using Firefox, it should not happen.

Love this idea! Would love a mobile version, if possible!

Thank for singing rat.