How to Completely Disable ‘Extensions’ (Add-ons) in Microsoft Edge

Microsoft Edge supports a massive ecosystem of browser extensions and add-ons. These small programs can dramatically enhance your web experience by blocking ads, managing passwords, or translating pages. However, in a corporate, educational, or highly secure environment, extensions represent a massive security vulnerability. Malicious or poorly coded extensions can intercept web traffic, steal session cookies, inject unwanted advertisements into pages, or serve as a vector for malware delivery. If you are managing a fleet of Windows devices and need to ensure absolute browser integrity, you must block users from installing extensions entirely.

This guide explains how to completely disable the installation and execution of all extensions in Microsoft Edge using the Windows Registry, locking the browser down to its core functionality.

Disable All Extensions via Registry Editor

To enforce a strict “no extensions” policy, we will use the ExtensionInstallBlocklist registry key. By configuring this key with a wildcard character, we instruct Edge to block absolutely every extension ID from loading or installing. This method requires Administrator privileges.

1. Ensure all Microsoft Edge windows are completely closed.
2. Press the Windows Key + R to open the Run dialogue box.
3. Type regedit and press Enter to open the Registry Editor. Click Yes if prompted by User Account Control.
4. Navigate down the left-hand directory tree to the following path:

   HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft

5. Check if a folder (Key) named Edge exists. If not, right-click the Microsoft folder, select New > Key, and name it exactly Edge.
6. Right-click on the Edge key itself, select New > Key, and name this new sub-key exactly: ExtensionInstallBlocklist.
7. Select the new ExtensionInstallBlocklist key. In the empty space on the right, right-click and choose New > String Value.
8. Name this new string value exactly 1.
9. Double-click the 1 string value to edit it. In the “Value data” field, type a single asterisk: *
10. Click OK and close the Registry Editor.

Verify the Extension Blocklist

When you next launch Microsoft Edge, the policy will immediately take effect. If you had any previously installed extensions, they will be forcefully disabled, and their icons will disappear from the toolbar.

To test the restriction, navigate to the Edge Add-ons store or the Google Chrome Web Store. Attempt to install any extension. The “Get” or “Add to Chrome” button will either be greyed out, or clicking it will result in an immediate error message stating: “Your admin has blocked ExtensionName.” Furthermore, if a user navigates to edge://extensions, they will see a banner indicating that their browser is managed by an organisation, and they will be entirely unable to toggle any disabled extensions back on.