Examine source code of Netscape Navigator

{
  "manifest_version": 2,
  "version": "2.1",
  "name": "Netscape Navigator",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(175, 204, 204)",
      "toolbar_text": "rgb(4, 52, 63)",
      "frame": "rgb(43, 134, 159)",
      "tab_background_text": "rgb(222, 229, 230)",
      "toolbar_field": "rgb(225, 246, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(60, 200, 227)",
      "popup": "rgb(166, 200, 206)",
      "popup_text": "rgb(23, 123, 145)",
      "button_background_hover": "rgba(65, 141, 157, 0.65)",
      "icons_attention": "rgb(24, 185, 218)",
      "icons": "rgb(11, 97, 115)",
      "ntp_background": "rgb(29, 143, 168)",
      "tab_loading": "rgb(60, 200, 227)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fdcd7827-687c-4c05-b7ad-b75ad077e558}"
    }
  }
}