1) To get the icon of Web Video Downloader back in Firefox, please click Tools>Sothink Web Video Downloader to open the side bar, and then you can check "Show toolbar button" option in it. At last, please close Firefox, and you will find the icon in toolbar when you reopen it.
2) How to manage flv downloads, please check User's manual here:
http://www.sothinkmedia.com/web-video-d ... /index.htm
If you have any other problems, please feel free to contact us by submitting a ticket here:
Thanks a lot and have a nice day.