Generally you download Facebook albums by downloading each photo one by one. This takes a lot of time if you want to download albums with more photos. Here is a Firefox Add-on which lets you download Facebook Albums as a whole. It is called FacePAD, a Facebook Photo Album Downloader which will make it easy to download picture or photo albums of your Facebook friends.
In order to use this, just install the FacePAD Add-on. Now go to your Facebook friend’s album and right click on any album you want to download. Select the option now “Download Album with FacePAD” from context menu. A popup window will open which will initiate the download process. Click OK to download the photos from the album.