Mark as watched UI is completely broken as it appears behind the thumbnails. There are even more conflicts with Crunchy set in my native language, there should be an option to turn off this feature completely.

Mark episode/entire series as watched/not watched function/UI is broken. Pops up BEHIND the episode below the episode you're managing's thumbnail.

I really liked most of the improvements. There's a problem with the theater mode. It only works when the Firefox window is using all your screen, otherwise you will only see a part of the video instead of the full image. Hopefully this will be resolved soon, so I can reinstall it.