I use this almost exclusively on YT video, and it works amazingly. I listen to a lot of music on YT video (versus it's actual music service due to a 1.25 speed preference potential autism) and I love this extension on Firefox, while wearing full noise-cancelling headphones.

Click your puzzle piece, open the mixer, and try all of the audio presets on your favorite banger. Strangely, the 'Ska' preset seems the fullest, but I love toggling the 'Live' and 'Club' settings.
There is a lot to play with, and the differences in audio are so stark. Try 'Classical' on the most un-classical song ever, or try "Live' on Daft Punk. It's fun, new, and free, you free-loading complainer.

Of course you can tweak it further with the sliders, I am not well versed in the audio tech, but for a lite add-on, I couldn't be happier.

Работает, не идеально, но хотя бы так, это единственное рабочее расширение Эквалайзер для FF, надо только добавить Preamp

1. Makes all < video > elements with mp4 sources have MIME errors
2. When the video is able to play, 70% of the extension isn't functional doesn't work
3. But when it does work it is kinda nice

Works ok but breaks videogifs.

It's not working in the latest Firefox update.

Tuyệt vời

Work in multiple sites

It greatly enhances listening experience. Presets are pretty close by genre, only requiring minor adjustments from son to song.

Good but does not allow videos to play in youtube studio when showing analytics.

the equalizer works... the audio sounds better. great !

Super wonderful! Twailer

Complete trash, it does nothing. Says it has preset BUT WHERE ARE THEY??? Morons.

Please fix it, its the only audio extention i can easily add a little bass quickly when i listen to music but having to diable it entirely whenever i dont specifically use it for youtube due to the fact that it breaks so many websites with media makes it not worth using.

extension is bullshit, breaks tiktok

it's a great addon! The audio doesn't bug, has good control parameters and graphic visualization helps a lot, apart from preamp.

Looking forward to new equalization styles!

Works fine with youtube, breaks many other sites' video playback. Not worth it.

음질이 향상된다는 장점이 있지만 특정 사이트들마다 게시글에 올려진 영상들이 재생이 자주 안되기도 해서 큰 단점이 있어요.(특히 구글맵의 영상들)
개선 바랍니다.
Although it has the advantage of improving sound quality, it has a major disadvantage in that videos posted on certain sites often do not play (especially videos on Google Maps).
Hope for improvement.