The only drawback is that some users complain the problem of not working. The installation procedure is so simple as well as the way of use. Unquestionably, these three Firefox add-ons YouTube Downloader have more advantageous than the others both in obtaining YouTube videos and extracting MP3 audio. Before trying, at first, users should install a lot of FFmpeg files.

It is capable of extracting the original audio file out of FLV videos as well as optionally downloading subtitles. This add-on is available for downloading all YouTube video formats with desired quality including FLV, MP4, WebM and 3GP. YouTube Video and Audio Downloader 0.3.6.2 It supports downloading MP4 360P/720P and FLV 240P. Better yet, this extension doesn't contain any ads and only links to YouTube's download URLs. Download YouTube Videos as MP4 1.7.25Īlso downloading YouTube videos as MP4 and FLV, this YouTube video downloading button has a simple interface which displays below the YouTube player. Same as its name, this 1-click is really simple and useful. Then click it to choose the wanted format for saving to hard drive. Firefox users can simply install a download button which could be seen as a red icon in any YouTube videos page. This is a Firefox add-on to download YouTube videos in FLV and MP4 format, which supports all available YouTube formats like MP4, FLV, WebM, and 3GP and any video quality from 144 pixel to 3072 pixel.

Easily Finish Firefox YouTube Downloading by Installing Add-ons 1- Click YouTube Video Downloader 2.3.4

Video downloader firefox