I’ve probably already re-read all possible topics related to my question, including this entire topic, and more than once.
So you are suggesting trying to use curl as stated in this post? But it is used there for authorization, and not for retrieving data on a site page, which is generated using JavaScript. As far as I understood correctly.
I would like to find at least some example of using UDF Webdriver in which data generated using JavaScript is read on the site.