PS3 System Software Update 4.87 Now Available For Download - PlayStation Universe
PS3 Received a New Firmware Update, By the Way - Push Square
Sony PlayStation 3 Firmware 4.88 Download | TechSpot
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
System Software Update Version 2.0 Disc CUSTOM ARTWORK some were asking about! : r/PS3