My experience: Eats more of my RAM with every new YouTube tab (seemingly uncapped but haven't fully stress-tested it) and slows down switching to fullscreen to ~2 seconds. Good idea, technically works, possibly vibe-coded.

a great extension for those wanting to learn a language while having fun. I learned English watching YouTube content and this extension would've helped me a lot back then, and will for sure help me now with reinforcement and with learning other languages. :)