That's it in the nutshell!

It seems to work for basic pages quite well, I think that lazy load will work for most pages as long as the JavaScript is embedded (no -j flag provided) and the Internet connection is on. It saves what's there when the page is loaded, the rest is a gamble since every website implements infinite scroll differently.

Authentication is another tricky part -- it's different for every browser. I will try to convert it into a web extension of sorts, so that pages could be saved directly from the browser while the user is authenticated.