PS3 Update 4.88 June 1, 2021 Firmware Patch Released - MP1st
PS3 Update to System Software 4.89: Here's a Full Guide for You - MiniTool Partition Wizard
I purchased a PS3 backward compatible from ebay for a good price and I'm impressed how clean it is. However... It's still on firmware 2.50. Should I update the firmware? : r/PS3
GitHub - PS3-4K-Pro/Firmware-Updates: Custom firmware update server for PS3™ 4K Pro.
PlayStation 3 updated to official firmware version 4.87 | GBAtemp.net - The Independent Video Game Community