Allow Sideloading of extension

Sideloading installs and runs unverified extensions in Microsoft Edge. With this policy, you can specify whether unverified extensions can be sideloaded in Microsoft Edge.

If enabled or not configured, sideloading of unverified extensions in Microsoft Edge is allowed.

If disabled, sideloading of unverified extensions in Microsoft Edge is not allowed. Extensions can be installed only through Microsoft store (including a store for business), enterprise storefront (such as Company Portal) or PowerShell (using Add-AppxPackage). When disabled, this policy does not prevent sideloading of extensions using Add-AppxPackage via PowerShell. To prevent this, in Group Policy Editor, enable Allows development of Windows Store apps and installing them from an integrated development environment (IDE), which is located at:

Computer Configuration > Administrative Templates > Windows Components > App Package Deployment

Supported versions: Microsoft Edge on Windows 10, version 1809
Default setting: Disabled or not configured
Related policies:
- Allows development of Windows Store apps and installing them from an integrated development environment (IDE)
- Allow all trusted apps to install​