firefox blocking old post pics?

I am trying to view an older thread, monster electric fan... https://board.moparts.org/ubbthreads/ubbthreads.php/topics/2485313/1.html and I cannot get the images to show up. Firefox says it is blocking the images as they "might not be secure". When I try to follow the advice on the net to "unblock" the images, I don't have the option to "enable or disable" images. Images work fine on the newer posts but for some reason, not on this old post. Is it possible the older post's pics were corrupted? I've even used a different browser AND a different computer. I still can't get the pics to show. Another browser doesn't even shop the pics to be there and another computer (and browser) just shows blue question marks wher the pics would be...


Can anyone computer experts figure out the problem?

Images in that thread that are hosted on Moparts open fine if you click on them

Thread was before the last upgrade which changed pictures to open automatically

A few pictures in that thread that were hosted elsewhere seem to be no longer there

Hi Tom, the first thread with the pic embedded that I can see is # 723622, from DaveRS23, page 4 of the thread for me. There are quite a few pics ahead of that, which show a pic filename, which I can pic and open in a new window, but all pics of the first 2 pages of the thread (mainly all of Feet's pics) won't open if I "select" them and just show a small little box with a square that has a broken line through it. Then after Dave's, it starts not showing any pics again.

Is that what you see?

With that page open, Firefox shows a grey lock with a yellow triangle. It says that part of the site is not secure (such as images). This is what I am thinking is not working correctly?

The pics on the first page are linked from some other site.
I saw stuff on another page that is also images that aren't loading that are from moparts but they might be smilies. I can't tell.