About a month ago, I started developing a Chrome and Firefox extension that could filter CF standings by country. For this to work, I developed a Python crawler that separates all Codeforces users by country and creates all the countries lists (since Codeforces lists have a limited size of 1000, I first sorted them by active users, then by rating).
It currently just supports normal Contests or Gyms, but I would love to hear any suggestions from you guys so I can improve it for everyone.
Also, it is an Open Source project! So if any of you like, you can open Pull Requests, Issues or Clone it!