Question: which is the best youtube downloader addon for firefox?
Answer: Flash Video Downloader. Flash Video Downloader is free and one of the best downloading tools and it is very simple to use. ... 
Video Download Helper. ... 
Video Downloader Professional. ... 
1-Click YouTube Video Download. ... 
Easy YouTube Video Downloader. ... 
Flash and Video Downloader. ... 
Video Download Pro. ... 
My Video Downloader.