Examine source code of My Bookmarks

{
  "name": "My Bookmarks",
  "description": "A browser action with a popup dump of all bookmarks, including search, add, edit and delete.",
  "version": "1.3",
  "manifest_version": 2,
  "permissions": [
    "bookmarks"
  ],
  "browser_action": {
    "default_title": "My Bookmarks",
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self' https://ajax.googleapis.com; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2dea4130-787a-4dc2-abd9-18d65b9098b5}"
    }
  }
}