YouTube-Converter Mozilla Addon Download YouTube Videos and convert them to mp3 or mp4 without relying on any website. You need the companion App for your PC. You can get it from https://github.com/philliphqs/YouTube-Converter
YouTube Downloader (UDL Helper) Mozilla Addon Download YouTube / Instagram / Odnoklassniki videos and extract audio from video with just a few mouse clicks. Supported media formats are MP3, MP4, WEBM. Capture frames from online videos with a screenshot button.
Youtube to Mp3 Converter Mozilla Addon Adds a lightweight button below YouTube videos. This button converts the corresponding video of youtube to mp3 instantly when clicked! This is the fastest solution for youtube to mp3 converter.