PS3 Firmware 4.88 released, do not update just yet - Wololo.net
Scena PS3] Rilasciato Custom Firmware 4.87.1 Evilnat Cobra [Download non più disponibile] – BiteYourConsole
PlayStation 3: Sony releases Firmware 4.87 for their 14 year old console - HFW 4.87.1 is already out with SEN Enabler already being updated to spoof FW 4.87 - Wololo.net