ServiceWorkerToControlSrcdocIframeEnabled

Allow ServiceWorker to control srcdoc iframes

Supported versions

• Windows: ≥ 134
• macOS: ≥ 134
• Android: ≥ 140
• iOS: Not supported

Description

https://github.com/w3c/ServiceWorker/issues/765 asks srcdoc iframe with the "allow-same-origin" sandbox attribute to be under ServiceWorker control.

By default (if left unset) or when set to Enabled, Microsoft Edge makes srcdoc iframes with "allow-same-origin" sandbox attributes to be under ServiceWorker control.

Setting the policy to Disabled prevents ServiceWorker control over srcdoc iframes.

This policy is temporary and planned for deprecation in 2026.

Supported features

• Can be mandatory: Yes
• Can be recommended: No
• Dynamic Policy Refresh: No - Requires browser restart
• Per Profile: Yes
• Applies to a profile that is signed in with a Microsoft account: No

Data type

• Boolean

Windows information and settings

Group Policy (ADMX) info

• GP unique name: ServiceWorkerToControlSrcdocIframeEnabled
• GP name: Allow ServiceWorker to control srcdoc iframes
• GP path (Mandatory): Administrative Templates/Microsoft Edge
• GP path (Recommended): N/A
• GP ADMX file name: MSEdge.admx

Example value

Enabled

Registry settings

• Path (Mandatory): SOFTWARE\Policies\Microsoft\Edge
• Path (Recommended): N/A
• Value name: ServiceWorkerToControlSrcdocIframeEnabled
• Value type: REG_DWORD

Example registry value

0x00000001

Mac information and settings

• Preference Key name: ServiceWorkerToControlSrcdocIframeEnabled
• Example value:

<true/>

Android information and settings

• Preference Key name: ServiceWorkerToControlSrcdocIframeEnabled
• Example value:

true

See also

• Microsoft Edge - Policies