You generally must be on the latest official firmware (OFW) to sign in to PSN, sync trophies, or access the PlayStation Store.
While the official PlayStation Support page notes that the update simply "improves system performance," its primary function is more practical: ps3 491 top
To play newer Blu-ray movie discs, the PS3 requires renewed encryption keys included in these annual updates. You generally must be on the latest official
You can update your console using two main methods. Regardless of the choice, ensure you have at least . How to update PS3 console system software - PlayStation ps3 491 top
Minor patches are often included to maintain account protection and system stability. Top Installation Methods