Captive Portal
Supported on: Firefox 67 or later, Firefox 60.7 ESR or later
Registry
HKLM
Software\Policies\Mozilla\Firefox HKCU
Software\Policies\Mozilla\Firefox Value name: CaptivePortal
Enabled: CaptivePortal = 1
Disabled: CaptivePortal = 0
Description
If this policy is disabled, captive portal support is disabled. If this policy is enabled or not configured, captive portal support is enabled.