The emulator requires the "full" Nintendo Switch system firmware to boot games and navigate system menus.
To get the most out of Ryujinx Full, here are some tips and tricks to keep in mind: ryujinx full
Emulation itself is legal in many jurisdictions when performed for interoperability, preservation, or backup of legally owned software. However: The emulator requires the "full" Nintendo Switch system
that allow the game to run at double its native frame rate on PC. Resolution Scaling ryujinx full