I don't use Facebook anymore. Its not about the privacy issue but I won't be using it any more. But there are my 50 photo albums that are very precious to me. In order to download it one image after another it takes months. After a few research I found this Firefox Add-on facepaste which fulfills my objective.
If you want to download all the photos of your facebook photo album at a single click then, you have this Firefox addon "facepaste" developed by Delan Azabani. This add on is free to download. Once you install this addon you can easily download all your album in a single click. You can also download multiple album at once.
After the installation:
#1 Right Click + Download Facebook Album(s)
Then you can see the screen similar as below
|facepaste User Interface|
But things like Add-on and extention don't necessarily exist in the browser in case facepaste doesnot exist any more please Search " Facebook Album Download " in firefox add-on search bar.
Also there exists an Application of Chrome Browser titled " Facebook Photo & Album Manager" This is more user friendly than facepaste. Choose whichever you like.