https://openuserjs.org/scripts/AddonDeveloper/YouTube_mp3_320_kbps/?orderBy=updated&orderDir=desc
About | YouTube mp3 320 kbps | Userscripts | OpenUserJS
The 320 kbps YouTube mp3 addon generates a MP3 button on YouTube.com. Convert YouTube to mp3 and download the file to your device.
youtube mp3 320 kbpsuserscriptsopenuserjs