Examine source code of Microsoft Windows XP

{
  "manifest_version": 2,
  "version": "1.3.3.7",
  "name": "Microsoft Windows XP",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "frame": "#235dda",
      "popup": "#EFE9DF",
      "popup_border": "transparent",
      "sidebar": "#f5f5f5",
      "sidebar_border": "#DCD9D3",
      "toolbar": "#efe9df",
      "toolbar_text": "#000",
      "toolbar_field": "#fdfdfc",
      "toolbar_field_text": "#000",
      "toolbar_field_border": "transparent",
      "toolbar_field_highlight": "#eaf1fb",
      "toolbar_field_highlight_text": "#104fc4",
      "toolbar_bottom_separator": "#DCD9D3",
      "toolbar_top_separator": "transparent",
      "tab_background_text": "#fff",
      "tab_line": "transparent",
      "tab_selected": "#efe9df",
      "button_background_active": "#fdfdfc"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0dd165db-3990-4458-a6ce-6bb7a2ab3834}"
    }
  }
}