Examine source code of Gold on Green

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Gold on Green",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-019-7ce748211c61f9059493d4c4378e8a74.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(28, 75, 46)",
      "toolbar_text": "rgb(234, 202, 4)",
      "frame": "rgb(28, 75, 46)",
      "tab_background_text": "rgb(193, 166, 0)",
      "toolbar_field": "rgb(251, 243, 217)",
      "toolbar_field_text": "rgb(32, 139, 88)",
      "tab_line": "rgb(234, 202, 4)",
      "popup": "rgb(3, 119, 64)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(225, 219, 203)",
      "icons": "rgb(255, 219, 49)",
      "sidebar_border": "rgb(187, 139, 16)",
      "sidebar_text": "rgb(234, 202, 4)",
      "sidebar": "rgb(28, 75, 46)",
      "tab_loading": "rgb(234, 202, 4)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{caa444d3-f4e2-45f7-a068-30b60e0c3b2c}"
    }
  }
}