Examine source code of Dark Orange

{
  "name": "Dark Orange",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "color.PNG"
    },
    "colors": {
      "frame": "rgba(89, 38, 17, 1)",
      "tab_background_text": "rgba(237, 223, 218, 1)",
      "toolbar": "rgba(140, 59, 27, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(107, 51, 30, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(140, 59, 27, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7325e327-fd76-42a3-9c31-7bb45eed3dda}"
    }
  }
}