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@@ -59,6 +59,8 @@ in your favourite language.*
 ## Tools and Utilities
 
 * [Alfie](https://alfie.prodo.ai/) -- Online JS editor that helps users solve AoC problems.
+* [Firefox extension](https://addons.mozilla.org/en-US/firefox/addon/aoc-ranking/) -- Browser extension for private leaderboard visualization
+* [Chrome extension](https://chrome.google.com/webstore/detail/advent-of-code-ranking/jbnlafikncgjjhdkmfhokcplgahebmjl) -- Browser extension for private leaderboard visualization
 
 ## Other Advent Calendars