Goto Extension Detail, click "backgroud page", and type your scripts in the console.
Extract current page:
new Extractor().task(".list-item", ["a.title", "p.content"]).start();
Extract multiple pages (1-10, interval 1):
new Extractor().task(".list-item", ["a.title", "p.content"],
"http://sample.com/?pn=${page}", 1, 10, 1).start();
Full document:
https://git.jebbs.co/jebbs/data-extracter-extesion