It's simply doesn't work. Try udl helper and don't waste your time

This extension does not work

does not work

Would give ZERO stars if I could. Literally does absolutely nothing. The "download MP3 of this video" button is nonexistent, and not because it's broken; it just never existed to begin with. Because with hindsight now that I'm giving it a closer look, it's extremely obvious that the screenshot where they supposedly show this imaginary button is a lazy edit. They just took a screenshot of a random video on YouTube and plastered what's supposed to look like a button underneath the video to trick you into thinking it was actually, you know, an extension for download MP3s off YouTube. Don't waste your time.

doesn't work

I never saw it....it is invisimble.

Tidak ada tombol apa2

simply doesn't work

The extension here from Firefox was last updated in 2018. Youtube has greatly changed since 2018 and so it isn't surprising such an old tool fails to be compatible with youtube as it now.

Doesn't work

No button appears so not working