Examine source code of Middle of 2000's glass UI

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "WMP11",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(17, 38, 49, 0)",
      "toolbar_text": "rgba(255, 255, 255, 0.9)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(218, 218, 218)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(230, 230, 230)",
      "tab_line": "rgb(0, 1, 2)",
      "popup": "rgba(5, 6, 8, 0.9)",
      "popup_text": "rgb(230, 230, 230)",
      "button_background_active": "rgba(0, 1, 2, 0.32)",
      "button_background_hover": "rgba(61, 147, 255, 0.44)",
      "frame_inactive": "rgba(47, 64, 93, 0.34)",
      "icons_attention": "rgb(29, 110, 218)",
      "tab_loading": "rgb(29, 110, 218)",
      "tab_selected": "rgba(28, 123, 255, 0.41)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_separator": "rgb(16, 21, 23)",
      "toolbar_top_separator": "rgb(16, 21, 23)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8f12e811-6a5a-4e7e-893f-f218107ab76f}"
    }
  }
}