With DownloadHelper, the Firefox add-on, you no longer need another program to download videos from video sites to your computer. You can download video and image files from many sites to your computer. Downloading videos to your computer is now easy with this Firefox add-on, which allows you to download videos from MySpace, Google videos, DailyMotion, Porkolt, iFilm, DreamHost and many other sites. To download a video, you need to: Find and download the video from the video page you have opened in the Tools - DownloadHelper tab.