Examine source code of Espe Links

{
  "manifest_version": 2,
  "name": "Espe Links",
  "description": "Links de interés para alumnos de la ESPE",
  "version": "1.2.1resigned1",
  "icons": {
    "128": "icon_128.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0cc71640-4887-4a27-97bc-765cfda839ca}"
    }
  }
}