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
PS3™ | System Update
PS3 Firmware 4.90 is out! (and you really don't want to update) - Wololo.net
GUIDE] Details & Installation Steps on PS3 System Update
Sony PlayStation 3 Firmware 4.90 Download | TechSpot
PS3 System Software Update v4.10 now available - Gaming Age
PlayStation 3 System Software Update 3.72 Now Live (updated) | by Sohrab Osati | Sony Reconsidered
I don't know...do I update? : r/PS3
Sony PlayStation 3 Firmware 4.60 Is Live – Download Links Available