Hold your 3DS steady, positioning the QR code image inside the bounding box on the top screen. The console will beep and vibrate slightly when it successfully reads the code.
homebrew app is largely considered deprecated. The version you're looking for, , was the final stable release from its developer KunoichiZ on GitHub luma updater 2.6 qr code
While the search term implies a user looking for a convenience tool, there are significant risks associated with using "Luma Updater 2.6" today. Hold your 3DS steady, positioning the QR code
The QR method is a when the automatic GitHub check fails. Hold your 3DS steady