https://www.playstation.com/en-ca/legal/ps4-system-software-beta-agreement/
PS4 System Software Beta Agreement (Canada)
ps4 system softwarebeta agreementcanada
https://www.playstation.com/fr-ca/legal/ps4-system-software-beta-agreement/
PS4 System Software Beta Agreement (FR Canada)
ps4 system softwarebeta agreementfrcanada
https://www.playstation.com/en-za/support/hardware/update-playstation-system-software-safe-mode/
How to update PS5 console and PS4 console system software in safe mode
If your PlayStation console has been offline for a long time, or a system software update has failed, you may need to update the PlayStation 'firmware'...
how to updateps4 system softwareps5 console
https://www.playstation.com/en-us/legal/ps4-system-software-beta-agreement/
PS4 System Software Beta Agreement (US)
ps4 system softwarebeta agreementus