GIF in IE + Firefox not shown but in Chrome under product description?


I wonder how and why gifs of the product are shown in Chrome browser but not in IE or Firefox browser.

The issue is more strange for me as IE and Firefox DO show the very same gifs any where else. Also gifs on other products are shown. But when it comes to this one asset linked above, the links seem to be broken.

Anyone have a clue why that might happen?