Youtube MP3 Downloader 作者： NZNBD

This is the official Mozilla Firefox web extension of YouTube MP3. Using this extension you can download any YouTube videos to mp3 format file. You do not need to copy paste the URL. Just install this extension and got to YouTube video page, click on the DOWNLOAD MP3 button. A new tab will be redirecting to the Youtubemp3.biz website. Just wait and after converting click on the download button. All conversions will be performed in high quality mode with a bitrate of at least 128 kBit/s. Need approximately 3 to 4 minutes per video.