Web Protection Failed to Block URLs After Chromium Browser Update
Summary: On September 8, 2023, Chrome version 117 introduced a new browser extension permission that must be enabled to allow web protection to function properly.
Symptoms
- As of May 2022, Dell Endpoint Security Suite Enterprise has reached End of Maintenance.
- As of January 2019, Dell Endpoint Security Suite Pro has reached End of Service.
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Affected Products:
- Dell Endpoint Security Suite Enterprise
- Dell Endpoint Security Suite Pro
Cause
Starting in Chrome version 117 and later, a new browser extension permission called Allow access to file URLs must be enabled for the web protection component (Trellix Endpoint Security Web Control) of Dell Endpoint Security Suite Enterprise and Dell Endpoint Security Suite Pro to block sites properly.
Resolution
This new browser extension permission can be enabled manually on the endpoint or, by enforcing this permission to be enabled using Group Policy Editor (GPO).
Enable manually directly on the endpoint
- Open a Chromium browser and click the three dots at the upper right corner.

Figure 1: Chromium browser settings
- Click Extensions then click Manage Extensions

Figure 2: (English Only) Click Manage Extensions
- Click Details under the Trellix Endpoint Security Web Control extension.

Figure 3: (English Only) Click Details
- Scroll down and click the toggle next to Allow access to file URLs.

Figure 4: (English Only) Enable Allow access to file URLs
Blocking should now work as expected.
Enable allow access to file URLs using GPO
- Edit or create a new GPO and go to Google > Google Chrome > Extensions.

Figure 5: (English Only) Edit or create a GPO for Google Extensions
- Enable the Extension management settings policy and place the JSON below in the extension management settings field.
{ "jjkchpdmjjdmalgembblgafllbpcjlei": { "file_url_navigation_allowed": true }}

Figure 6: (English Only) Add JSON to Extension management settings
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