DNS & Web Filtering Q&A

Some websites can create false positives with ad blocker rules. For this reason, every Adblocker has a feature to bypass for a website.

It is possible to left-click on the DefensX extension icon, disable the Adblocker (image 1), and click the refresh icon on that page (image 2)

DefensX browser extensions have different Extension ID values depending on the browser and whether the computer is in a managed or unmanaged state. Below is a detailed breakdown of how extension updates work based on the system’s management status.

Chromium-Based Browsers (Google Chrome, Microsoft Edge, Brave, etc.):

Chromium-based browsers enforce the following update rules:

How Managed Status is Determined:

Mozilla Firefox:

Unlike Chromium-based browsers, Firefox does not differentiate between managed and unmanaged computers.

Therefore, DefensX always distributes its Firefox extension updates via its own CDN instead of a public marketplace.

DefensX Extension ID List

GPO Configuration for Extension Whitelisting

If you are enforcing a browser extension whitelist policy via Group Policy (GPO), it is recommended to allow both managed and unmanaged extension IDs to ensure seamless updates and compatibility.

If you are already distributing browser extensions through GPO (in addition to DefensX), policy updates overwrite the existing list of force-installed extensions. The DefensX Agent automatically detects this situation and re-applies the required policies. However, depending on timing, this may temporarily remove the DefensX extension and trigger a fresh installation.

Although the browser reinstalls the extension automatically, it is treated as a new installation. As a result, previously granted permissions (such as allowing the extension to run in Incognito mode) may be reset.

Recommended Solution

To prevent this behavior, you should add the DefensX extension ID to the same GPO object used to distribute other browser extensions.

Example Configuration

Suppose you are already deploying the Microsoft SSO extension from the Chrome Web Store (extension ID: ppnbnpeolgkicgegkbkbjmhlideopiji) and want to include the DefensX extension.

Follow these steps:

You can apply the similar approach for Microsoft Edge using the corresponding extension ID.

Required Configuration Entries for GPO: