TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
Verified with Mozilla Firefox v8.2 — updated on July 10, 2026
Supported on: Firefox 97 or later, Firefox 91.6 ESR or later
Path in the GPO console
Computer Configuration\Administrative Templates\Mozilla\Firefox\Disabled Ciphers User Configuration\Administrative Templates\Mozilla\Firefox\Disabled Ciphers Description
If this policy is enabled, the corresponding cipher is disabled. If this policy is disabled, the corresponding cipher is enabled. If this policy is not configured, the corresponding cipher is enabled or disabled based on the default in Firefox.
Registry
HKLM
Software\Policies\Mozilla\Firefox\DisabledCiphers HKCU
Software\Policies\Mozilla\Firefox\DisabledCiphers Value name: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
Enabled: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = 1
Disabled: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = 0
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: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Firefox 97 or later, Firefox 91.6 ESR or later
[HKEY_LOCAL_MACHINE\Software\Policies\Mozilla\Firefox\DisabledCiphers]
"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 97 or later, Firefox 91.6 ESR or later
$path = 'HKLM:\Software\Policies\Mozilla\Firefox\DisabledCiphers'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA' -Value 1 -Type DWordIntune 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: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 97 or later, Firefox 91.6 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Mozilla\Firefox\DisabledCiphers' -Name 'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 97 or later, Firefox 91.6 ESR or later
$path = 'HKLM:\Software\Policies\Mozilla\Firefox\DisabledCiphers'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 97 or later, Firefox 91.6 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: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 97 or later, Firefox 91.6 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Mozilla\Firefox\DisabledCiphers' -Name 'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Firefox 97 or later, Firefox 91.6 ESR or later
$path = 'HKLM:\Software\Policies\Mozilla\Firefox\DisabledCiphers'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.