Offline Website Data (Deprecated)

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: OfflineApps

Enabled: OfflineApps = 1

Disabled: OfflineApps = 0

Description

If the policy is enabled, offline application storage is cleared when the browser is closed. If this policy is disabled or not configured, offline application storage is not cleared when the browser is closed.