Sony PSP go Instruction Manual page 48

Parental control for the Internet browser
Under (Security Settings), you can restrict the ability
to start the Internet browser. If you set this restriction, the
screen to enter the 4-digit password will be displayed
before the Internet browser starts.
1
Select (Settings)
[Internet Browser Start Control], and then
press the
The password entry screen is displayed.
2
Using the directional buttons, enter the 4-
digit password, and then press the
button.
3
Select [On], and then press the

Parental control
(Security Settings)
button.
button.