Last year I created a visualization of our private leaderboard [1], but that required same manual work to update the ranking each day.

So for this year I've converted it to a browser extension, so it fetches the data automatically :) Available for both Firefox [2] and Chrome [3].

[1] https://github.com/amochtar/aoc-ranking [2] https://addons.mozilla.org/en-US/firefox/addon/aoc-ranking/ [3] https://chrome.google.com/webstore/detail/aoc-ranking/jbnlaf...