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
PlayStation 3 hack – how it happened and what it means | Games | The Guardian
PlayStation 3 system software - Wikipedia
PS3 System Software 4.89 Update Live, Don't Update Your Firmware! | PSXHAX - PSXHACKS
How to Hack PlayStation 3 | Redmond Pie
How To Jailbreak Your PS3 On 4.89 With NEW CFW! - YouTube
Sony's PlayStation 3 experiences its biggest hack yet - CNET
Crazy Hacks #4: When the PS3 was so weak you could even hack it with a Ham and Cheese sandwich - Wololo.net
Tutorial - PS3 Downgrade FAQ | CabConModding
PlayStation 3 — tips, tricks, and hacks for ps3 gaming « PlayStation 3 :: WonderHowTo
Release] PS3 Toolset by bguerville - (Contains new PS3 Exploit for 4.82-4.85) | GBAtemp.net - The Independent Video Game Community