It is a noob-proof (N)3DS Custom Firmware, that also allows you to run.

Do not include any spoilers in a post title. Luma3DS is a homebrew program to patch the system software of (New) Nintendo (2DS) 3DS handheld consoles, adding features such as per-game language settings, debugging capabilities for developers, and removing restrictions enforced by Nintendo such as the region lock. Use the tag in the beginning of your title and give a general description of its contents. Spoiler tagging DOESN'T WORK in post titles. If your comment contains a spoiler, hide it using: >!This is a spoiler. Posts with spoilers in the title will be removed. No NSFW content, low-effort posts, vague or misleading titles, reposts, image only, or friend code / request posts. It is essentially a graphical shell around an existing. This includes game recommendations and tech support topics. The Homebrew Launcher, also known as Homebrew Menu (hbmenu for short), is the main menu used to list and launch homebrew applications. Questions which can be quickly answered via a Google search or those which have been addressed in the wiki must be directed to the Weekly Question Thread. No basic questions or those covered in the wiki. Once I exited the Download Play app, and re-opened it to open the homebrew launcher, I got the screen that you see above.

All posts should be civil and follow Reddiquette. I was curious to see what the newly released Luma3DS 10.0 CFW had to offer, and was trying to get the homebrew launcher running via the Rosalina menu. Comments should be on-topic with the thread in which it is posted. Threads should be directly related to the 3DS and its accessories. Mario & Luigi: Bowser's Inside Story + Bowser Jr's Journey is available now! Journey through /r/Mario Join Our Discord Server PM Mode! AM Mode! First time 3DS owners, make sure to check out our FAQ and Wiki

How to close homebrew launcher 3ds