Examine source code of Purple Arch

{
  "name": "Purple Arch",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "p.jpg"
    },
    "colors": {
      "frame": "rgba(23, 7, 46, 1)",
      "tab_background_text": "rgba(240, 240, 240, 1)",
      "toolbar": "rgba(0, 11, 52, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(50, 18, 102, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(143, 5, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c6dfb14-d40a-4ad6-9af6-075f4050c046}"
    }
  }
}