Examine source code of Windows Explorer 7

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Windows XP",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-010-e9f94a3e61666a4c7677eb9cce17d854.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(239, 239, 239, 0.67)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(190, 230, 245)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgba(190, 230, 245, 0.96)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(52, 120, 253)",
      "button_background_hover": "rgba(255, 255, 255, 0)",
      "icons_attention": "rgb(52, 120, 253)",
      "icons": "rgba(0, 0, 0, 0.5)",
      "popup_border": "rgba(131, 196, 242, 0.8)",
      "popup_highlight": "rgba(255, 255, 255, 0.96)",
      "tab_selected": "rgba(131, 196, 242, 0.8)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0.22)",
      "toolbar_field_border": "rgba(0, 0, 0, 0.22)",
      "toolbar_top_separator": "rgba(131, 196, 242, 0.8)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8c2e6efa-cc97-4027-8678-93a05f582c1d}"
    }
  }
}