Here's the problem with latest Firefoxes (15-17) as well as Palemoon: Create three folders on your desktop - name them A, B and C. Now open up Firefox. Go to webpages that have multiple images to download. Click open the images from the various webpages while holding down the Ctrl key.. You will now have multiple tabs of the various images. Now open each tab with an image, right click the image, save as a random name and make the download designation folder A. Do this for all tab images. Now go back to the first tab image, right click the image, save as a random name and make the download designation folder B. Continue doing this for remaining tab images. As soon as you attempt to download an image from a different webpage, Firefox will change the download designation to folder A. Typically when you set a download designation in a browser, the designation does not change unless you manually change it. Firefox will keep changing the download folder for each new webpage with images. Now do the same as the last paragraph but save the images to folder C. As soon as you get to an image from different webpage, Firefox will (I do not see why it is doing it) change the download folder to either A or B, but not C.