ImageGrabber is a Firefox add-on, it can grab images that are protected through an invisible foreground image. ImageGrabber is an extension for Firefox designed to add some small functions to identify images through regular expressions. This function can be used to download images which are protected with a transparent spacer image which is above the actual image.
If you try to save the image from the page, youll usually just download the spacer image instead of the image you want to download. To skip the inhandy step through the "page information", you just can specify some regular expressions which identify those images.
Then you just have to click on a small status-bar icon to download the image you want to have.

Requirements:
* Firefox

The license of this software is Free, you can free download and free use this browser plug-ins software.