Show HN: Simple Chrome extension to play focus music (chromewebstore.google.com)

I built this because I was tired of the focus music dance—opening YouTube, fighting autoplay recommendations, getting distracted by comments.

As a developer, I spend hours in deep work mode. I wanted something that just works: one click, instant focus music with actual binaural beats (not just labeled that way).

I'd love your feedback: Which genre do you reach for when you need to focus? Any features you'd want to see added?