LegacyProfiles

Disable the feature enforcing a separate profile for each installation. If this policy set to true, 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 set to false, Firefox will create a new profile for each unique installation of Firefox.

This policy only work on Windows via GPO (not via policies.json).

Values

Set to true to share one profile across every installation, the same as the MOZ_LEGACY_PROFILES environment variable.
Set to false to create a separate profile for each installation. This is the same as not setting the policy.

Examples

{
  "policies": {
    "LegacyProfiles": true
  }
}

Windows (GPO)

Software\Policies\Mozilla\Firefox\LegacyProfiles = 0x1 | 0x0

Compatibility

Firefox	Firefox ESR	Firefox Enterprise
Available since 70	Available since 68.2	Not supported

Windows only, GPO only.

CCK2 Equivalent: N/A
OMA-URI: LegacyProfiles
Preferences Affected: N/A