Controls whether unload event handlers can be disabled.
Verified with Microsoft Edge 152.0.4191.53 — updated on July 10, 2026
Supported on: Microsoft Edge version 118, Windows 7 or later
Path in the GPO console
Computer Configuration\Administrative Templates\Microsoft Edge WebView2 User Configuration\Administrative Templates\Microsoft Edge WebView2 Description
unload event handlers are being deprecated. Whether they fire depends on the unload Permissions-Policy. Currently, the policy allows them by default. In the future, they move to being disallowed by default, and sites must explicitly enable them using Permissions-Policy headers. This enterprise policy can be used to opt out of this gradual deprecation by forcing the default to stay enabled. Pages might depend on unload event handlers to save data or to signal the end of a user session to the server. This dependency isn't recommended because it's unreliable and impacts performance by blocking use of BackForwardCache. Recommended alternatives exist, but the unload event has been used for a long time. Some applications might still rely on them. If you disable this policy or don't configure it, unload event handlers are gradually deprecated in-line with the deprecation rollout, and sites that don't set Permissions-Policy header stop firing `unload` events. If you enable this policy, the unload event handlers continue to work by default.
Registry
Software\Policies\Microsoft\Edge\WebView2 Software\Policies\Microsoft\Edge\WebView2 Value name: ForcePermissionPolicyUnloadDefaultEnabled
Enabled: ForcePermissionPolicyUnloadDefaultEnabled = 1
Disabled: ForcePermissionPolicyUnloadDefaultEnabled = 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: Controls whether unload event handlers can be disabled.
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Microsoft Edge version 118, Windows 7 or later
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge\WebView2]
"ForcePermissionPolicyUnloadDefaultEnabled"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Controls whether unload event handlers can be disabled.
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 118, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge\WebView2'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ForcePermissionPolicyUnloadDefaultEnabled' -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: Controls whether unload event handlers can be disabled.
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 118, Windows 7 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge\WebView2' -Name 'ForcePermissionPolicyUnloadDefaultEnabled' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Controls whether unload event handlers can be disabled.
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 118, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge\WebView2'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ForcePermissionPolicyUnloadDefaultEnabled' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Controls whether unload event handlers can be disabled.
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 118, Windows 7 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: Controls whether unload event handlers can be disabled.
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 118, Windows 7 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge\WebView2' -Name 'ForcePermissionPolicyUnloadDefaultEnabled' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Controls whether unload event handlers can be disabled.
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 118, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge\WebView2'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ForcePermissionPolicyUnloadDefaultEnabled' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.