Examine source code of 123B

{
  "name": "Gray orange",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "white-background-with-orange-geometric-free-vector.jpg"
    },
    "colors": {
      "frame": "rgba(135, 134, 130, 1)",
      "tab_background_text": "rgba(242, 135, 5, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2bf61016-39c5-4d66-b522-6f4df9a138dd}"
    }
  }
}