Firefox Web Developer Tools Does Not Detect Network Activity Initiated From CSS

[Pxartist]

I am an avid user of Inspect Element (Web Developer Tools) to understand how websites function and to gain access to images/resources on a website in instances where right-clicking isn't enough.

I wanted to directly save this image: https://imgur.com/a/W50pZqI from https://lian-li.com/product/o11-dynamic-evo-xl/ and a right-click + Open Image in New Tab was not enough.

I spent at least 2 hours looking over the Network tab in Web Developer Tools, unfolding code blocks associated with the element, looking for id patterns in the inspector tab, and searching for every *.webp, *.png, etc. image filetype in the HTML. When I was about to give up the search and settle for a screenshot, I decided to saving the website using the Save Page As function and open the file locally to see if the element had a "magical proprietary" loading method that would cause it to be nonfunctional when operating locally.

To my surprise, Firefox Web Developer Tools was finally able to detect the image in the Network tab. I tried searching for the file in the HTML, but got no results. Afterwards, I tried using a Chromium Based Browser (Brave)'s Developer Tools for the same website and was able to detect the file's network activity on the very first try. The non-Firefox Web Developer Tool was also able to locate the very CSS file that coded for and initiated the request for the file. It was even able to locate the same file when the webpage was opened locally. On the other hand, the Firefox Web Developer Tool was not able to identify the initiator at all.

In my humble opinion, I think Firefox Web Developer Tools is in dire need of improvement.

Firefox Web Developer Tools Network Activity for Desired File on website: https://imgur.com/a/0340t0V

Firefox Web Developer Tools Network Activity for Desired File on saved local website: https://imgur.com/a/bMlQlFd

Chromium Web Developer Tools Network Activity for Desired File on website: https://imgur.com/a/tAz6mle

Chromium Web Developer Tools Network Activity for Desired File on saved local website: https://imgur.com/a/uPozpxS