Accept third-party cookies (Deprecated): registry value AcceptThirdPartyComputerHKLM\Software\Policies\Mozilla\Firefox\Cookies

Policy ID: Cookies_AcceptThirdParty
Scope: Computer Configuration, User Configuration
Supported on: Firefox 60 or later, Firefox 60 ESR or later
Source: Mozilla Firefox Policy Templates (version 8.3)
Category: Mozilla › Firefox › Cookies

Registry

AcceptThirdParty

REG_SZComputerUser

…\Software\Policies\Mozilla\Firefox\CookiesHKLM\Software\Policies\Mozilla\Firefox\Cookies Current key
HKCU\Software\Policies\Mozilla\Firefox\Cookies

Enabled value: Depends on the option value
Element: -

Options
Item	Stored value
Always	always
Never	never
From visited	from-visited

Apply with .reg · CMD · PowerShell

ComputerMachine-wide setting

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Mozilla\Firefox\Cookies]

; Options (use only one)
; Always
"AcceptThirdParty"="always"
; Never
"AcceptThirdParty"="never"
; From visited
"AcceptThirdParty"="from-visited"

CMD

:: Options (use only one)

:: Always
reg add "HKLM\Software\Policies\Mozilla\Firefox\Cookies" /v "AcceptThirdParty" /t REG_SZ /d "always" /f
:: Never
reg add "HKLM\Software\Policies\Mozilla\Firefox\Cookies" /v "AcceptThirdParty" /t REG_SZ /d "never" /f
:: From visited
reg add "HKLM\Software\Policies\Mozilla\Firefox\Cookies" /v "AcceptThirdParty" /t REG_SZ /d "from-visited" /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Mozilla\Firefox\Cookies' -Force | Out-Null

# Options (use only one)
# Always
New-ItemProperty -Path 'HKLM:\Software\Policies\Mozilla\Firefox\Cookies' -Name 'AcceptThirdParty' -PropertyType String -Value 'always' -Force | Out-Null
# Never
New-ItemProperty -Path 'HKLM:\Software\Policies\Mozilla\Firefox\Cookies' -Name 'AcceptThirdParty' -PropertyType String -Value 'never' -Force | Out-Null
# From visited
New-ItemProperty -Path 'HKLM:\Software\Policies\Mozilla\Firefox\Cookies' -Name 'AcceptThirdParty' -PropertyType String -Value 'from-visited' -Force | Out-Null

UserPer-account setting

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Mozilla\Firefox\Cookies]

; Options (use only one)
; Always
"AcceptThirdParty"="always"
; Never
"AcceptThirdParty"="never"
; From visited
"AcceptThirdParty"="from-visited"

CMD

:: Options (use only one)

:: Always
reg add "HKCU\Software\Policies\Mozilla\Firefox\Cookies" /v "AcceptThirdParty" /t REG_SZ /d "always" /f
:: Never
reg add "HKCU\Software\Policies\Mozilla\Firefox\Cookies" /v "AcceptThirdParty" /t REG_SZ /d "never" /f
:: From visited
reg add "HKCU\Software\Policies\Mozilla\Firefox\Cookies" /v "AcceptThirdParty" /t REG_SZ /d "from-visited" /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\Software\Policies\Mozilla\Firefox\Cookies' -Force | Out-Null

# Options (use only one)
# Always
New-ItemProperty -Path 'HKCU:\Software\Policies\Mozilla\Firefox\Cookies' -Name 'AcceptThirdParty' -PropertyType String -Value 'always' -Force | Out-Null
# Never
New-ItemProperty -Path 'HKCU:\Software\Policies\Mozilla\Firefox\Cookies' -Name 'AcceptThirdParty' -PropertyType String -Value 'never' -Force | Out-Null
# From visited
New-ItemProperty -Path 'HKCU:\Software\Policies\Mozilla\Firefox\Cookies' -Name 'AcceptThirdParty' -PropertyType String -Value 'from-visited' -Force | Out-Null