Examine source code of Shipment Board

{
  "manifest_version": 2,
  "name": "Shipment Board",
  "version": "4.9",
  "description": "A local board of parcels in transit: paste or scan a code, mark deliveries, jump straight to carrier tracking.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f96cf444-1587-4e2f-b9ab-bd1f1e0e4aeb}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "64": "assets/icon-64.png",
    "96": "assets/icon-96.png",
    "128": "assets/icon-128.png"
  },
  "browser_action": {
    "default_title": "Shipment Board",
    "default_popup": "core/popup.html",
    "default_icon": {
      "32": "assets/icon-32.png",
      "48": "assets/icon-48.png",
      "64": "assets/icon-64.png",
      "96": "assets/icon-96.png",
      "128": "assets/icon-128.png"
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ]
}