Examine source code of a rice fields

{
  "name": "a rice fields",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "ngon nui tuyet (18).png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d18812a-f9d9-4f62-87bb-8dc7597b7c6e}"
    }
  }
}