If speed and ease of use is what you need when you want to save images, nothing beats this:
Extension: Easy DragToGo
Version: 1.1.2.4
Author/Extension Homepage:
http://addons.sociz.com/firefox/700/
Mozilla Download:
https://addons.mozilla.org/en-US/firefox/addon/6639
Description: Allows you to open a new tab, save an image, etc all by using simple mouse gestures...
Notes: Left click on an image and make a slight drag down, and the image is automatically saved to a folder...Leftclick and a slight drag left will open up the 'Save As' menu...Left click and s slight drag up will automatically save it to your 'Vintage Folder', etc...Easy to customize, even easier to use...Its a must have IMO...