Just found out about greasemonkeys to modify websites. It seems like a nice way to mod websites.
Add a small widget that shows https://gist.github.com/vikranth22446/c6923aa1b2cff6718ae3472e2ae9cf20
Adds a small button that lets you fork the repo https://gist.github.com/vikranth22446/a1390fe632d998b43bf270f27e390c43
Youtube RSS Feed Button https://gist.github.com/vikranth22446/78c6cd6db8464ecfd482ff0db51f6f98
Yotube Music Volume Mix: https://greasyfork.org/en/scripts/397686-youtube-music-fix-volume-ratio