HTTPS-Only Mode: registry value HttpsOnlyModeComputerHKLM\Software\Policies\Mozilla\Firefox

Policy ID: HttpsOnlyMode
Scope: Computer Configuration, User Configuration
Supported on: Firefox 127 or later
Source: Mozilla Firefox Policy Templates (version 8.3)
Category: Mozilla › Firefox

Registry

HttpsOnlyMode

REG_SZComputerUser

…\Software\Policies\Mozilla\FirefoxHKLM\Software\Policies\Mozilla\Firefox Current key
HKCU\Software\Policies\Mozilla\Firefox

Enabled value: Depends on the option value
Element: -

Options
Item	Stored value
Off by default	allowed
Off and locked	disallowed
On by default	enabled
On and locked	force_enabled

Apply with .reg · CMD · PowerShell

ComputerMachine-wide setting

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Mozilla\Firefox]

; Options (use only one)
; Off by default
"HttpsOnlyMode"="allowed"
; Off and locked
"HttpsOnlyMode"="disallowed"
; On by default
"HttpsOnlyMode"="enabled"
; On and locked
"HttpsOnlyMode"="force_enabled"

CMD

:: Options (use only one)

:: Off by default
reg add "HKLM\Software\Policies\Mozilla\Firefox" /v "HttpsOnlyMode" /t REG_SZ /d "allowed" /f
:: Off and locked
reg add "HKLM\Software\Policies\Mozilla\Firefox" /v "HttpsOnlyMode" /t REG_SZ /d "disallowed" /f
:: On by default
reg add "HKLM\Software\Policies\Mozilla\Firefox" /v "HttpsOnlyMode" /t REG_SZ /d "enabled" /f
:: On and locked
reg add "HKLM\Software\Policies\Mozilla\Firefox" /v "HttpsOnlyMode" /t REG_SZ /d "force_enabled" /f

PowerShell

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

# Options (use only one)
# Off by default
New-ItemProperty -Path 'HKLM:\Software\Policies\Mozilla\Firefox' -Name 'HttpsOnlyMode' -PropertyType String -Value 'allowed' -Force | Out-Null
# Off and locked
New-ItemProperty -Path 'HKLM:\Software\Policies\Mozilla\Firefox' -Name 'HttpsOnlyMode' -PropertyType String -Value 'disallowed' -Force | Out-Null
# On by default
New-ItemProperty -Path 'HKLM:\Software\Policies\Mozilla\Firefox' -Name 'HttpsOnlyMode' -PropertyType String -Value 'enabled' -Force | Out-Null
# On and locked
New-ItemProperty -Path 'HKLM:\Software\Policies\Mozilla\Firefox' -Name 'HttpsOnlyMode' -PropertyType String -Value 'force_enabled' -Force | Out-Null

UserPer-account setting

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Mozilla\Firefox]

; Options (use only one)
; Off by default
"HttpsOnlyMode"="allowed"
; Off and locked
"HttpsOnlyMode"="disallowed"
; On by default
"HttpsOnlyMode"="enabled"
; On and locked
"HttpsOnlyMode"="force_enabled"

CMD

:: Options (use only one)

:: Off by default
reg add "HKCU\Software\Policies\Mozilla\Firefox" /v "HttpsOnlyMode" /t REG_SZ /d "allowed" /f
:: Off and locked
reg add "HKCU\Software\Policies\Mozilla\Firefox" /v "HttpsOnlyMode" /t REG_SZ /d "disallowed" /f
:: On by default
reg add "HKCU\Software\Policies\Mozilla\Firefox" /v "HttpsOnlyMode" /t REG_SZ /d "enabled" /f
:: On and locked
reg add "HKCU\Software\Policies\Mozilla\Firefox" /v "HttpsOnlyMode" /t REG_SZ /d "force_enabled" /f

PowerShell

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

# Options (use only one)
# Off by default
New-ItemProperty -Path 'HKCU:\Software\Policies\Mozilla\Firefox' -Name 'HttpsOnlyMode' -PropertyType String -Value 'allowed' -Force | Out-Null
# Off and locked
New-ItemProperty -Path 'HKCU:\Software\Policies\Mozilla\Firefox' -Name 'HttpsOnlyMode' -PropertyType String -Value 'disallowed' -Force | Out-Null
# On by default
New-ItemProperty -Path 'HKCU:\Software\Policies\Mozilla\Firefox' -Name 'HttpsOnlyMode' -PropertyType String -Value 'enabled' -Force | Out-Null
# On and locked
New-ItemProperty -Path 'HKCU:\Software\Policies\Mozilla\Firefox' -Name 'HttpsOnlyMode' -PropertyType String -Value 'force_enabled' -Force | Out-Null