No. From the site: > User scripts can improve your browsing experience, and open a lot of possibilities to make the sites you visit better by adding features,

No. From the site: > User scripts can improve your browsing experience, and open a lot of possibilities to make the sites you visit better by adding features, making them easier to use, or taking out the annoying bits. These are like browser extensions. They don't run on a backend server, they run in your browser on certain pages, and can manipulate the contents of those pages.