Examine source code of Windows XP Luna Dark

{
  "name": "Windows XP Luna Dark",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "WXPL BG.png"
    },
    "colors": {
      "frame": "rgba(36, 36, 36, 1)",
      "tab_background_text": "rgba(240, 240, 240, 1)",
      "toolbar": "rgba(36, 36, 36, 1)",
      "bookmark_text": "rgba(240, 240, 240, 1)",
      "toolbar_field": "rgba(92, 92, 92, 1)",
      "toolbar_field_text": "rgba(240, 240, 240, 1)",
      "tab_line": "rgba(0, 44, 166, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a2151a8e-0170-4357-8377-7e39f9965cd1}"
    }
  }
}