Block

block stops a matching network request.

Add conditions before enabling

A Block profile with no conditions applies to requests from every browser page. Enabling it can prevent all pages from opening.

The action has no additional fields. A profile with this action is registerable as soon as the profile is enabled, even if it has no conditions. Headerly displays a warning for global profiles.

Within Headerly, an allow or allowAllRequests rule of equal or higher priority takes precedence over Block. Across extensions, Chrome gives Block higher action precedence than Redirect, Upgrade Scheme, Allow, or Allow All Requests.

Use narrow conditions and verify the result in Developer Tools.