xifangczy/cat-catch ? reverse-engineered prompt

Build me a browser extension that can detect and download media from webpages. I want to be able to click on an icon in my toolbar, and a small window should pop up listing all the video and audio files it finds on the current page.

It should be especially good at finding streaming videos, like the ones that come in little pieces (m3u8 streams), and let me download the whole thing as a single file. For each piece of media it finds, it should show some basic info and a clear 'download' button next to it.

The extension should be compatible with modern browsers like Chrome, Firefox, and Edge. Let’s keep the interface simple and clean. The main goal is just to sniff page resources and make them easy to save for offline use.