Yeah, there must have been some sort of change.
When I go to the "Chrome" link, I get exactly the same thing.
I tried opening a Chrome browser session and when I do, not only do I get the same screen shot you did, since I'm using Chrome and not Firefox, I can no longer see my photos either.
If I open a Firefox browser, while I still get the same screen shot you do, at least I can now see my photos.
So this work around only works when the USER is using Firefox AND has gone to the link and uploaded the add on, NOT a lot of help.
So, once I've uploaded my photos to something like IMGUR I'll see if that works better.
My first attempt above doesn't seem to work.