I'm curious what GNU considers "non free" JavaScript. If it's any JS without a "free" license, then I would imagine that the vast, vast majority of websites are

I'm curious what GNU considers "non free" JavaScript. If it's any JS without a "free" license, then I would imagine that the vast, vast majority of websites are non-free. The website I work on has been in development for 3 years with more than a dozen engineers. The source code is proprietary, i.e., not free as in speech. The app is React, so blocking all non-free JS would render the site as a blank page. An extension would have to replicate the entire front-end. They expect volunteers to faithful replicate thousands of man hours of work for every single website? It appears to me that in making this request they didn't think through the difficulty of the task.