Jan 04, · 0 Top 3 Firefox Add-ons To Download YouTube Videos. YouTube is the #1 streaming search engine, helps you to find videos on any topic. From funny videos to health, reviews, how-to tutorials and lectures for school learning. Jul 08, · Video DownloadHelper supports several types of streamings, making the add-on unique amongst Video downloaders: HTTP, MP2T, F4F, Whenever a site uses a non-supported streaming technology, Video DownloadHelper is also able to capture directly from the screen and generate a /5(19K). Flash Video Downloader is probably the second most famous Video downloader add-on on the Firefox add-on repository. The add-on has around , users with an average rating of which is no joke! According to Paul Saint, the developer behind this awesome add-on, it can download YouTube videos even in 4K resolution which is pretty amazing. Easy Youtube Video Downloader is a cross-browser, cross-platform and free web-browser add-on to perform conversion on external servers and offer Full-HD and MP35/5(1). Oct 30, · The open-source developer community really cranks out some beautiful stuff—everything from do-it-all video downloaders like Video DownloadHelper, Video Downloader Professional, Flash and Video Downloader, 1-Click Downloader, and slicelive.com to super niche video downloaders like Instagram Video Download or Private Video Downloader.