Best add-on I have ever installed. I got way more than I expected. The top features I love about this is that I can have my volume on YouTube be at 10 volume and sound like it's normal 100% volume with a x7 booster. Now I can actually hear the audio well! The other things I love is that my appearance for my YouTube is color coated by my personal preference. The last main thing I love is that I can loop certain points of a video. (also ad blocker)