PlayStation 3: Sony releases Firmware 4.86 for their 13 year old console - HFW 4.86 released, SEN Enabler updated & PS3HEN to be updated soon due to no kernel changes! - Wololo.net
How to update your PlayStation 3 firmware using a flash drive, memory card - AfterDawn
Sony Pulls Down 2.40 PS3 Firmware | WIRED
PS3 System Software 4.86 Update Live, Don't Update Your Firmware! | PSXHAX - PSXHACKS
PlayStation 3 system software - Wikipedia
PS3 Firmware 2.70 Direct Download Link - PlayStation LifeStyle
Darthsternie on Twitter: "Updated https://t.co/h1lz5cnkI6 - Added PS5 Firmware 05.00 - Added PS4 Firmware 9.50 - Added PS3 CFWs for 4.85. 4.86. 4.87 & 4.88 - Added some PS3 & PS4 Controller Firmwares https://t.co/lItbJuScLe" / Twitter
How to install PlayStation 3 custom firmware, run homebrew - AfterDawn
PS3 System Update 4.80 Now Available To Download | Attack of the Fanboy