YouTube tweaks their code often, so the extension breaks for a day or two every few months. But the developer usually fixes it before I remember to complain.
I’ve tried online converters that made me feel like I was navigating a pop-up minefield. This Firefox add-on? Different story. youtube video mp3 downloader firefox
Here’s an interesting, slightly quirky review you can use or adapt for a Firefox extension that downloads YouTube videos as MP3: YouTube tweaks their code often, so the extension
One click and poof — the audio from a 3-hour lo-fi hip-hop stream or an obscure 2008 indie track is sitting on my desktop as a clean MP3. No “please verify you’re human” circus. No fake download buttons. It just… works. Even better, it lives inside my browser toolbar, so I don’t have to copy-paste URLs into sketchy websites anymore. This Firefox add-on
“The Audio Genie My Browser Didn’t Know It Needed” Rating: ⭐⭐⭐⭐☆ (4/5)