Examine source code of nz 13

{
  "name": "nz 13",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(10, 33, 245, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{931a820d-be58-4e2c-b22a-43d9957ec907}"
    }
  }
}