23++ is a free Chrome extension developed by David Johnson that adds additional functionality to the 23andMe website. Designed to improve the user experience, this extension is compatible with 23andMe's original website, accessible to customers tested prior to 2014.

One of the main features of 23++ is its enhancement of the Relative Finder tool. It provides a more user-friendly interface and improved interpretation of the results. Additionally, the extension completely replaces 23andMe's inbox, offering a more efficient way to browse, sort, filter, and archive messages.

Beyond these core features, 23++ offers a variety of other enhancements. For a comprehensive list of features, users can visit the extension's website.

Please note that 23++ is licensed under the GNU General Public License and incorporates components licensed under the MIT license. The extension is distributed in a minimized form, but the original sources can be downloaded from the extension's website.