i had a problem is the add-on dosent support mp3 download, can Freemp3downloadonlone Fix it?

Works partially. If you click "download mp3", it will redirect you to some site with another "download" link. If you click this one as well, it start downloading, however download just hangs indefinitely, tried twice.

However, if instead you click the "copy link to mp3" and use plain `wget https://link`, the link works. So... there's is a way to make it work with this extension, just not the obvious one.

I wonder why it doesn't just fetch mp3 from the browser cache.