How to Prevent People from Installing Extensions in Chrome

Chrome extensions can be incredibly useful — but in the wrong hands, they can also pose serious risks. If you’re managing a shared computer or simply want to control what gets added to your browser, it’s a smart move to block users from installing new Chrome extensions.

Here’s how to do it.

1. Use Chrome’s Built-In Extension Management (for Individual Users)

If you’re not using a managed device, you can still block extension installs with a few extra steps:

On Windows:

1. Open the Registry Editor (Win + R → type regedit → Enter).
2. Navigate to:
   HKEY_LOCAL_MACHINE\Software\Policies\Google\Chrome
   (Create the “Google” and “Chrome” keys if they don’t exist.)
3. Right-click the Chrome folder → New → Key → Name it ExtensionInstallBlocklist.
4. Inside ExtensionInstallBlocklist, create a new String Value:
   • Name: 1
   • Value: *
     This blocks all extensions from being installed.
5. Restart Chrome.

On macOS:

Use the Terminal or a configuration profile:

• Create a plist file with: <key>ExtensionInstallBlocklist</key> <array> <string>*</string> </array>
• Save it in: /Library/Managed Preferences/com.google.Chrome.plist

⚠️ These changes require admin rights.

2. Use Google Admin Console (For Organizations)

If you’re managing a fleet of devices via Google Workspace, this is the cleanest method.

1. Go to the Google Admin Console.
2. Navigate to:
   Devices > Chrome > Settings > Users & Browsers
3. Select the organizational unit (OU) you want to configure.
4. Scroll to Apps and Extensions > Users & Browsers.
5. Under Extension types to allow, select “Block all extensions.”
6. Click Save.

This locks down extension installs across all devices tied to that OU. You can still whitelist specific ones if needed.

3. Use Parental Controls or Third-Party Tools

If you’re looking to restrict access without digging into system files or admin consoles, you can:

• Set up parental controls on Windows or macOS.
• Use third-party software like:
  • Cold Turkey (Windows/macOS)
  • Forticlient or OpenDNS (network-level control)

These tools can block access to the Chrome Web Store altogether.

Final Thoughts

Blocking Chrome extension installs is about protecting users from malware, distractions, or unwanted changes. Whether you’re an IT admin or a parent, locking this down gives you more control over the browsing environment.

Want to go further? Consider combining this with:

• URL blocking for the Chrome Web Store
• User account restrictions
• Chrome kiosk mode for ultra-restricted setups

If you need a step-by-step walkthrough for your specific setup, drop a comment below — I’m here to help.