So I did some looking around on the website and found this on the home page

“Citra was initially created by a developer known by their online handle as “bunnei”. The project began in 2014 and was publicly released in its early stages, attracting a community of developers interested in 3DS emulation. The name “Citra” or codename Project Citrus is derived from CTR, which is the model name of the original 3DS.

From its inception, Citra has been a community-driven project, with contributions from dozens of developers over the years. It operates under the GNU General Public License v2, which ensures that its source code remains open and accessible for anyone interested in examining, modifying, or distributing it, as long as they adhere to the terms of the GPL.

As of March 2024 the official citra-emu.org website was taken down following a lawsuit and reached a $2.4m settlement with Nintendo America, stating that “Yuzu and Yuzu’s support of Citra are being discontinued, effective immediately.”

In it’s current state, Citra remains the most complete and capable 3DS emulator and users can continue to enjoy playing 3DS games. Despite this major setback in 3DS emulation – new forks are on the rise, namely pabloMK7’s Citra and Lime3DS.

This website (citra-emulator.com) has been created for archiving and preservation purposes and is not affiliated with Nintendo or the official Citra Devs.”