Just short after the release of the firmware 9.3.0-21, Nintendo released a new update for the 3DS system family upgrading its number to 9.4.0-21. If you feel you’re lacking stability, don’t worry, here’s a new one without a new single feature:
Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.
Remember you need to update your console in order to use online features and access the Nintendo eShop.