PS3 Tutorial (2021) - Downgrade from ANY cfw to ANY lower cfw EASY! 2 methods.. with details & tips - YouTube
My PS3 YLOD while updating to 4.82 in order to downgrade | GBAtemp.net - The Independent Video Game Community
How downgrade fw 4.83 to 4.82? | GBAtemp.net - The Independent Video Game Community
Downgradable PS3 Models - Wololo.net
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
How to downgrade 4.82 PS3 to OFW 3.55 - YouTube
PS3 Firmware 4.82 released, one year after last update & mere days after 4.81 exploit revealed - Wololo.net