Examine source code of Cookie Viewer for Android

{
  "manifest_version": 2,
  "name": "Cookie Viewer",
  "version": "1.0",
  "description": "View cookies for the current tab",
  "icons": {
    "64": "icon.png"
  },
  "permissions": [
    "cookies",
    "tabs",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8043f4d4-e34d-4fe0-b1ea-f99ebc4d6f18}"
    }
  }
}