Examine source code of Favorite Links Saver

{
  "manifest_version": 2,
  "name": "Favorite Links Saver",
  "version": "1.0",
  "description": "Save and display a list of favorite links.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f76d9d6b-a087-4004-b663-7373dceec6b9}"
    }
  }
}