First to actually Work Universally Rated 5 out of 5 stars
I've tried Easy Youtube Downloader, Download Helper, Flashget, and others as well. This was the first one that I had no trouble using on Facebook videos. The icon is at the bottom right of your browser (I used 3.6.3) and you right click it and there will be a bold heading "videos to download". Make your selection there.This review is for a previous version of the add-on (0.3.7.1-signed).