This page is the redirect target of requests matching rule 1 from redirect-rules.json.
The pattern `||example.com/|` means: (sub)domain of `example.com`, with path "/" and nothing else before the end of the URL.

      {
        "id": 1,
        "priority": 4,
        "condition": {
          "urlFilter": "||example.com/|",
          "resourceTypes": ["main_frame"]
        },
        "action": {
          "type": "redirect",
          "redirect": {
            "extensionPath": "/redirectTarget.html"
          }
        }
      },

For the redirect to have succeeded, three conditions must be met:

- The declarativeNetRequest (DNR) rule should match the request.
- The extension must declare the pre-redirect URL in `host_permissions` (in manifest.json) and the user should grant the permission.
- The extension path in `extensionPath` must be declared in `web_accessible_resources` (in manifest.json), and the pre-redirect URL should match the pattern in `matches`.

See popup.html for the permissions UI and examples.