cristminix/LLFetcher ? reverse-engineered prompt

Build me a Chrome extension like LLFetcher for LinkedIn Learning that lets me easily download course resources for offline use.

I want it to work on a course page and let me grab video files in different sizes, captions or transcripts, and any exercise files that come with the lesson. Make the UI simple and easy to understand, with clear download options and a smooth flow so I can just open a course and pick what I want. It should feel like a practical downloader for people who use LinkedIn Learning a lot and want to keep materials for later.

If you need to check current browser extension docs or modern Chrome requirements, look them up online and make sure it installs cleanly and works in a normal Chrome browser.