security.default_personal_cert
Verified with Mozilla Firefox v8.2 — updated on September 2, 2026
Supported on: Firefox 68 or later, Firefox 68 ESR or later
Path in the GPO console
Computer Configuration\Administrative Templates\Mozilla\Firefox\Preferences (Deprecated) User Configuration\Administrative Templates\Mozilla\Firefox\Preferences (Deprecated) Description
If this policy is enabled, the preference is locked to the value selected. If this policy is disabled, it has no effect. For a description of the preference, see: https://firefox-admin-docs.mozilla.org/reference/policies/preferences/.
Registry
HKLM
Software\Policies\Mozilla\Firefox\Preferences HKCU
Software\Policies\Mozilla\Firefox\Preferences Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
Applying both scopes creates an ambiguous configuration (computer takes precedence over user). Only do this intentionally.
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: security.default_personal_cert
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Firefox 68 or later, Firefox 68 ESR or later
[HKEY_LOCAL_MACHINE\Software\Policies\Mozilla\Firefox\Preferences]
"security.default_personal_cert"="Ask Every Time"More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: security.default_personal_cert
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 68 or later, Firefox 68 ESR or later
$path = 'HKLM:\Software\Policies\Mozilla\Firefox\Preferences'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'security.default_personal_cert' -Value 'Ask Every Time' -Type StringIntune XML
No direct Policy CSP / OMA-URI mapping for this policy. Use the Intune Remediation tab, or ingest the ADMX in Intune.Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: security.default_personal_cert
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 68 or later, Firefox 68 ESR or later
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Mozilla\Firefox\Preferences' -Name 'security.default_personal_cert' -Expected 'Ask Every Time' -Kind String)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: security.default_personal_cert
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 68 or later, Firefox 68 ESR or later
$path = 'HKLM:\Software\Policies\Mozilla\Firefox\Preferences'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'security.default_personal_cert' -Value 'Ask Every Time' -Type StringSCCM scripts
# Exported from gporais.com
# Policy: security.default_personal_cert
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 68 or later, Firefox 68 ESR or later
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: security.default_personal_cert
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 68 or later, Firefox 68 ESR or later
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Mozilla\Firefox\Preferences' -Name 'security.default_personal_cert' -Expected 'Ask Every Time' -Kind String)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: security.default_personal_cert
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 68 or later, Firefox 68 ESR or later
$path = 'HKLM:\Software\Policies\Mozilla\Firefox\Preferences'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'security.default_personal_cert' -Value 'Ask Every Time' -Type StringBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.