Advent of Code delta-rank is a Chrome add-on developed by electricweb. This add-on enhances the functionality of the Advent of Code platform by adding a new ordering option to private leaderboards. With this new feature, users can now view points and rankings based on delta times.

The add-on introduces a new "Delta score" option, which is displayed under the list of ordering methods on any private leaderboard page. To utilize this feature, simply click on the "Ordering" button and then select "Delta score". This allows users to analyze their performance in relation to time differences, providing a unique perspective on their progress.

Advent of Code delta-rank is a free add-on, making it accessible to all users. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This add-on is a valuable addition for Advent of Code participants, offering an alternative way to evaluate their standings and track their improvement over time.