Examine source code of Cookie Checker

{
  "manifest_version": 2,
  "name": "Cookie Checker",
  "version": "1.1",
  "description": "View all cookies for the current site in popup",
  "permissions": [
    "cookies",
    "tabs",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c7a68ff-779f-476e-ba3e-e7c3013145ba}",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "64": "icon64.png",
      "128": "icon128.png"
    },
    "default_title": "Cookie Checker",
    "default_popup": "popup.html"
  }
}