Examine source code of Decorations by Nature

{
  "name": "Decorations by Nature",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "DecoratedbyNatureH2Custom.jpg"
    },
    "colors": {
      "frame": "rgba(195, 196, 214, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(195, 195, 214, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(195, 195, 214, 0.1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{34bee099-172c-4c36-9b90-fc9b78a0f0a0}"
    }
  }
}