Downloading images from facebook albums can be quite a tedious task if there are lot of images in the album and if you have to download the image click by click.
To simplify this task, you can use the FacePAD extension, which will help you download all the images in a facebook album at once.
You can not only download images from your album, but also from your friends albums, group albums, and event albums. A good handy tool to take back up of all the images your friend uploads.
See this video for more help :