There seems to be a script running that loads the images (img.lazy-load) in the background that doesn't appear to be working.

This bookmarklet will make some images visible:

javascript:e=document.querySelectorAll("img.lazy-load");for(i=0;E=e[i];i++){E.setAttribute("src",E.getAttribute("image-src"));E.style.visibility="visible";}

Create a new bookmark and paste the JavaScript bookmarklet code in its location field or evaluate the code via the command line of the Web Console (Firefox menu button or Tools > Web Developer).

• http://en.wikipedia.org/wiki/Bookmarklet

thank you so much

You're welcome.

I don't know how those images are loaded because searching the loaded JavaScript files for "lazy" doesn't bring up anything. The script could possibly be loaded via an other script that doesn't show in the net log.