LegacySameSiteCookieBehaviorEnabledForDomainList

Revert to legacy SameSite behavior for cookies on specified sites.

If this policy is set to true, cookies set for domains in this list will revert 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 96
CCK2 Equivalent: N/A
Preferences Affected: network.cookie.sameSite.laxByDefault.disabledHosts

Windows (GPO)

Software\Policies\Mozilla\Firefox\LegacySameSiteCookieBehaviorEnabledForDomainList\1 = "example.org"
Software\Policies\Mozilla\Firefox\LegacySameSiteCookieBehaviorEnabledForDomainList\2 = "example.edu"

Windows (Intune)

OMA-URI:

./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox/LegacySameSiteCookieBehaviorEnabledForDomainList

Value (string):

<enabled/>
<data id="LegacySameSiteCookieBehaviorEnabledForDomainList" value="1&#xF000;example.org&#xF000;2&#xF000;example.edu"/>

macOS

<dict>
  <key>LegacySameSiteCookieBehaviorEnabledForDomainList</key>
  <array>
    <string>example.org</string>
    <string>example.edu</string>
  </array>
</dict>

policies.json

{
  "policies": {
    "LegacySameSiteCookieBehaviorEnabledForDomainList": ["example.org", "example.edu"]
  }
}