How to get PS3 Firmware update for installing on PS3 or PS3 emulator - YouTube
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
The PS3™ Guides: Updating Your PS3 - YouTube
PlayStation 3 system software - Wikipedia
PS3 Firmware Update out: 4.85! Don't update to this OFW! So what now? CFW & HEN systems - YouTube
PS3 Update 4.89 Now Live; Adds Additional Account Protection
PS3 just got a new system update, a month before its store was originally set to go offline | GamesRadar+