Legacy Profiles

Supported on: Firefox 70 or later, Firefox 68.2 ESR or later

Registry

HKLM Software\Policies\Mozilla\Firefox

HKCU Software\Policies\Mozilla\Firefox

Value name: LegacyProfiles

Enabled: LegacyProfiles = 1

Disabled: LegacyProfiles = 0

Description

If this policy is enabled, Firefox will not try to create different profiles for installations of Firefox in different directories. This is the equivalent of the MOZ_LEGACY_PROFILES environment variable. If this policy is disabled or not configured, Firefox will create a new profile for each unique installation of Firefox.