The PS3 update 4.90 was released on , primarily to improve system performance and renew Blu-ray encryption keys . While newer versions like 4.93 are now available as the latest official releases, version 4.90 remains a significant milestone for users maintaining legacy setups or specific homebrew configurations. Download and Official Status
The PS3 update 4.90 is a relatively minor update, and according to Sony's official changelog, it includes: ps3 update 4.90 download
To update your PS3 to version 4.90, follow these steps: The PS3 update 4