Nikon D50 Firmware Official

There was only one major public firmware update released by Nikon during the camera's lifespan (Version 1.0 to Version 1.01).

Unlike Canon’s CHDK or Nikon’s later “hacked” firmwares (e.g., Nikon Hacker for D90/D3/D700), the D50 never received any community firmware modifications. What you see is what Nikon shipped. nikon d50 firmware

Do not touch any buttons or turn off the camera until the screen says "Done." Troubleshooting Common Issues "Update" Option Not Appearing There was only one major public firmware update