Map Quizzer is a free Chrome add-on developed by retrent. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This program allows you to test your cartographic knowledge by presenting you with random maps from the Library of Congress' collection.

When you open a new tab or window, Map Quizzer greets you with a blank page featuring a map from the Library of Congress. Your task is to guess the date when the map was published, with hints available to assist you. This interactive experience provides an engaging way to improve your understanding of cartography while exploring the vast collection of historical maps.

Please note that Map Quizzer is not an official product of the Library of Congress. However, it offers a fun and educational opportunity for map enthusiasts and anyone interested in testing their geographic knowledge.

With Map Quizzer, you can enhance your cartographic acumen with each new tab, making it an enjoyable and educational addition to your browsing experience.