This link may help; https://www.dvdvideosoft.com/free-dvd-video-software-download.htm

''qammari143 [[#question-1162628|said]]'' <blockquote> Downloads YouTube videos in all available formats (FLV, MP4, WebM, and 3GP) with video quality of your choice with firefox easily.Follow the steps. http://www.ithemesforests.com/how-to-download-youtube-videos-with-firefox-in-any-format/ </blockquote> Do you have a problem installing the add-on &nbsp; ? If so : &nbsp; would you try and contact the developer &nbsp; ?