Examine source code of Autumn Shines

{
  "name": "Autumn Shines",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "AutumnShinesHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(201, 98, 43, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(201, 101, 43, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(201, 101, 43, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f05232ca-25d5-495f-b8be-8f630fe7435c}"
    }
  }
}