Link: https://www.analogue.co/support/3d/firmware/1.2.6

General

• Clarification on Advanced HDR. See the updated User Guide.
• Improved: SD card stability

Core

• Improved: Progressive Output (beta)
  • Blinking or flickering screens have been fixed for certain games such as Resident Evil 2 when using Progressive Output

OS

• New: Library Cartridge Colors
  • Change the color of Library cartridges to your liking
  • In Library navigate to ‘Configure > Customization’
  • Gray / Red / Green / Blue / Yellow / Gold / Black / Purple / Pink
  • Colors for original cartridges are set by default based on their release
• New: Long game titles now scroll in Library
• Improved: ‘Progressive Output’ can now be toggled from the In-Game Menu during gameplay
• Improved: OS visual polish
• Updated: Auto Overclock behavior
• Updated: 3DOS Hotkeys list
• Updated: Avg/Max Luminance settings

Thanks for posting the updates :)