Locked

Supported on: Firefox 74 or later, Firefox 68.6 ESR or later

Registry

HKLM Software\Policies\Mozilla\Firefox\SanitizeOnShutdown

HKCU Software\Policies\Mozilla\Firefox\SanitizeOnShutdown

Value name: Locked

Enabled: Locked = 1

Disabled: Locked = 0

Description

If this policy is disabled, all shutdown preferences can be changed by the user. If this policy is enabled, any shutdown preferences explicitly set via policy cannot be changed by the user. If this policy is not configured, no shutdown preferences can be changed by the user (previous behavior).