Image Downloader - for Firefox by Suricata Tech

You can filter the images based on image characteristics.
You can select which image to download or download all images that pass filtering.
You can choose a custom folder for the images and a custom file name sequence.

Main features:

+ Very quick and clean group display of all images.
+ Download a single, multiple or all images in the web page.
+ Filter images by: width, height, type, orientation and aspect ratio or URL.
+ Custom or auto generated folders and files names.