Make sure you haven't enabled High Contrast mode in the OS settings.

Make sure you allow pages to choose their own colors as this affects background images.

• Settings -> General -> Language and Appearance -> Colors -> Manage Colors
  "Override the colors specified by the page with your selections above"

Try "Never" if the default "Only with High Contrast themes" isn't working.

• https://support.mozilla.org/en-US/kb/disable-high-contrast-mode-firefox

Setting was at NEVER, tried all 3 settings, does not make the images appear.

Also, this version of FF is opening new windows smaller than full size (tiling maybe?) and I want them to open without any gaps that I can accidentally type into.

Also can't see the main image in Etsy, but do see the thumbnails. But they won't open.

And also cannot see the images in the RESULTS page on Amazon.

Show the issue(s). Provide screenshots and links. Here what I see.

the area where the thumbnails should be is blank. On Amazon, I might seen the empty square, or sometimes on a product page a small ovalish shape, which is new behavior. CLicking on the empty area does not bring up the full size image.

There is sometimes a script being called, visible in Firefox lower left corner. Something like "images - [something] -ssl.amazon.com" and sometimes the loading just spins forever.

This page is behaving normally, wrt thumbnails showing full size when clicked upon: https://www.amazon.com/RYOBI-800-Watt-Automotive-Power-Inverter/dp/B09SY6K83M

Randomly bad behavior...

screen shot of part of shopping cart page

product search results page

But at the moment, clicking on the text to open the specific product in a new tab, I AM able to get the thumbnails to open full size. Randomly weird.