Manual Update Only
Supported on: Firefox 88 or later, Firefox 78.10 ESR or later
Registry
HKLM
Software\Policies\Mozilla\Firefox HKCU
Software\Policies\Mozilla\Firefox Value name: ManualAppUpdateOnly
Enabled: ManualAppUpdateOnly = 1
Disabled: ManualAppUpdateOnly = 0
Description
If this policy is enabled, the user will not be prompted to install updates and Firefox will not check for updates in the background. The user must manually check and install updates from the About dialog. If this policy is disabled or not configured, the browser receives updates. This policy is not recommended for most users.