Examine source code of Swing in the Forest

{
  "name": "Swing in the Forest",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "SwingintheForestHcopyCustom.jpg"
    },
    "colors": {
      "frame": "rgba(11, 112, 18, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(5, 94, 12, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(1, 66, 7, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ceebe57e-f087-4596-97dd-cf57a08e38d2}"
    }
  }
}