Examine source code of GoldSource GUI

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "GoldSource GUI",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top",
        "right top",
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(76, 88, 68)",
      "toolbar_text": "rgb(160, 170, 149)",
      "frame": "rgb(90, 106, 80)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(62, 70, 55)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(151, 135, 52)",
      "popup": "rgb(62, 70, 55)",
      "popup_text": "rgb(196, 181, 80)",
      "button_background_active": "rgb(151, 135, 52)",
      "button_background_hover": "rgba(151, 135, 52, 0.2)",
      "icons_attention": "rgb(196, 181, 80)",
      "ntp_background": "rgb(40, 46, 34)",
      "popup_border": "rgb(136, 145, 128)",
      "tab_background_separator": "rgba(54, 12, 255, 0)",
      "tab_selected": "rgb(151, 135, 52)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(40, 46, 34)",
      "toolbar_field_border_focus": "rgb(151, 135, 52)",
      "toolbar_field_border": "rgb(136, 145, 128)",
      "toolbar_field_focus": "rgb(62, 70, 55)",
      "toolbar_field_highlight": "rgb(136, 145, 128)",
      "toolbar_top_separator": "rgb(40, 46, 34)",
      "tab_loading": "rgb(151, 135, 52)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7c36c230-6c41-4010-a508-f76913fb728c}"
    }
  }
}