browser help

My mom’s browser (latest Ubuntu Firefox; I checked) has mysteriously disappeared the images on amazon.co.uk. Now, everything I’ve found for troubleshooting this tells you to go to Firefox -> (Tools)Options -> Options -> Content -> something to the effect of “display images on sites”; I cannot currently actually find the instructions, but it’s not actually relevant because:

The current version of Firefox, and this is true on every platform I’ve tried it on, does not *have* something to the effect of “display images”, although I certainly remember older versions having it. So we have been unable to get her pictures back because the browser apparently no longer gives us the option to click on, and I’m at a total loss as to how to proceed.

Does anybody have any idea how to fix this? It’s pretty annoying, and it seems ridiculous that it can’t be sorted out. Help, help!