Control use of the Web Serial API

Supported on: Firefox 151 or later

Registry

HKLM Software\Policies\Mozilla\Firefox
HKCU Software\Policies\Mozilla\Firefox

Options

DefaultSerialGuardSetting enum
  • Do not allow any site to request access to serial ports via the Web Serial API -> 2
  • Allow sites to ask the user to grant access to a serial port -> 3

Description

If this policy is enabled, you can control whether websites can request access to serial ports. Note: If any other policies are configured and this policy is not set, the Web Serial API is blocked by default.