LegacySameSiteCookieBehaviorEnabled

Enable default legacy SameSite cookie behavior setting.

If this policy is set to true, it reverts all cookies to legacy SameSite behavior which means that cookies that don't explicitly specify a SameSite attribute are treated as if they were SameSite=None.

Compatibility

Firefox	Firefox ESR	Firefox Enterprise
Available since 76	Available since 78	Available since 149

CCK2 Equivalent: N/A
OMA-URI: LegacySameSiteCookieBehaviorEnabled
Preferences Affected: network.cookie.sameSite.laxByDefault

Examples

policies.json

{
  "policies": {
    "LegacySameSiteCookieBehaviorEnabled": true
  }
}

JSON schema

LegacySameSiteCookieBehaviorEnabled JSON schema

{
  "type": "boolean"
}

Windows (GPO)

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

macOS

<dict>
  <key>LegacySameSiteCookieBehaviorEnabled</key>
  <true/> | <false/>
</dict>