Disable Set Desktop Background

Supported on: Firefox 60 or later, Firefox 60 ESR or later

Registry

HKLM Software\Policies\Mozilla\Firefox

HKCU Software\Policies\Mozilla\Firefox

Value name: DisableSetDesktopBackground

Enabled: DisableSetDesktopBackground = 1

Disabled: DisableSetDesktopBackground = 0

Description

If this policy is enabled, the user cannot set an image as their desktop background. If this policy is disabled or not configured, the user can set images as their desktop background.