baha
+1y
I'm pretty sure I figured out what it is. Firefox gives you the option to block images from certain sites and maybe this was enabled on accident. That would explain why it's only happening to you on this site.
This is a how to on how to unblock images from mozilla's site
Make sure that you are allowing all images to load and that images from specific sites are not being blocked:
* In Firefox, look under "Tools -> Options -> Content" and
o Make sure that "Load images automatically" is checked.
o Open [Exceptions] and remove any sites being blocked.
o Use about:config to make sure that the preference permissions.default.image is set to "1", the default value (right-click and select "Reset" if any other value is shown). [2]