Examine source code of Autumn Shadows

{
  "name": "Autumn Shadows",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "AutumnShadowsHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(209, 152, 88, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(209, 152, 88, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(199, 121, 32, 0.05)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ceace363-2b41-4f42-8e54-b793931fb1ec}"
    }
  }
}