Back when I used to listen to MP3s from my hard drive, I used ReplayGain[0] to normalize the loudness. It took a not-insignificant amount of time to run on my m

Back when I used to listen to MP3s from my hard drive, I used ReplayGain[0] to normalize the loudness. It took a not-insignificant amount of time to run on my music library though, so I'm not sure how it would do in real time. I've always wished that YouTube and the like would do this. For websites without a dark mode, I use Dark Reader[1]. It does a fairly good job on most sites. It even works on Google maps and PDFs! [0] https://en.wikipedia.org/wiki/ReplayGain https://en.wikipedia.org/wiki/ReplayGain [1] https://darkreader.org/ https://darkreader.org/