When you install the add-on, you'll view a new icon featuring an eye next to the address bar. Click it whenever you'll want to download all images.
Of course, you can access options menu to change the download folder and set hotkeys to make it even easier.
We should highliught that the program will download only pure images (jpg, gif, png,...) so if you want to download HTML images and extras you'll have to change settings.
Bazzacuda Image Saver Plus is perfect for image fans. If you usually download lots of photos, this can be really useful.