Revert to legacy SameSite behavior

Policy ID: LegacySameSiteCookieBehaviorEnabled
Scope: Computer Configuration, User Configuration
Supported on: Firefox 96 or later
Source: Mozilla Firefox Policy Templates (version 8.3)
Category: Mozilla › Firefox

Description

If this policy is enabled, Firefox will revert to the legacy behavior of SameSite. This means that cookies that don't explicitly specify a SameSite attribute are treated as if they were SameSite=None.

If this policy is disabled or not configured, Firefox will enforce SameSite=lax.

Registry

ComputerHKEY_LOCAL_MACHINE

HKLM\Software\Policies\Mozilla\Firefox View registry values

LegacySameSiteCookieBehaviorEnabledREG_DWORD

UserHKEY_CURRENT_USER

HKCU\Software\Policies\Mozilla\Firefox View registry values

LegacySameSiteCookieBehaviorEnabledREG_DWORD

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