The latest official firmware for the PlayStation Vita is version 3.74
That being said, here's some interesting content: ps vita 374 firmware link
The latest official firmware for the PlayStation Vita and PlayStation TV is , released on May 10, 2022. This update primarily focuses on strengthening account security by requiring a device-specific password for PlayStation Network (PSN) sign-ins and removing the ability to create accounts directly on the console. Official PS Vita 3.74 Firmware Download Links The latest official firmware for the PlayStation Vita