I wrote a short JavaScript snippet to export HN Favorites to a CSV file. It scrapes the HTML and navigates from page to page.
Setup and usage instructions are in the file.
Check out https://gabrielsroka.github.io/getHNFavorites.js or to view the source code, see https://github.com/gabrielsroka/gabrielsroka.github.io/blob/...
[0] https://news.ycombinator.com/item?id=22788236