Official Sony support documentation notes that the update also includes "improved usability and enhanced security" to maintain general system performance. For users with custom firmware, the Vita Hacks Guide provides specific instructions for safely updating or re-jailbreaking devices on this version.
: This is a fascinating exploit that allows for System URI calls on the official firmware (OFW). It was discovered by a hacker named "Li" and, when chained with a bug in the PSN Sign Up application, it allows for account switching even on the latest firmware 3.74. This workaround directly countered Sony's changes to account management, giving users a way to log into different PSN accounts on their hacked devices. ps vita 374 firmware new