Part of the advantage of running JavaScript in your browser is that you might already be authenticated and it can use your session. But, fetching your HN favorites doesn't require authentication.

  #!/usr/bin/env python3
  import requests
  from bs4 import BeautifulSoup

  for p in range(1, 17):
      r = requests.get(f'https://news.ycombinator.com/favorites?id=app4soft&p={p}')
      s = BeautifulSoup(r.text, 'html.parser')
      print([{'title': a.text, 'url': a['href']} for a in s.select('a.storylink')])