Examine source code of Fun puddle

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Fun puddle",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-021-775b159da029a74f5c76e835cd65e9dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(191, 192, 192)",
      "toolbar_text": "rgb(45, 49, 66)",
      "frame": "rgb(79, 93, 117)",
      "tab_background_text": "rgb(224, 213, 207)",
      "toolbar_field": "rgb(224, 213, 207)",
      "toolbar_field_text": "rgb(45, 49, 66)",
      "tab_line": "rgb(239, 131, 84)",
      "popup": "rgb(191, 192, 192)",
      "popup_text": "rgb(45, 49, 66)",
      "ntp_background": "rgb(224, 213, 207)",
      "ntp_text": "rgb(79, 93, 117)",
      "popup_border": "rgb(239, 131, 84)",
      "tab_loading": "rgb(239, 131, 84)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eb047eba-58f9-4a7e-be13-3c192101768f}"
    }
  }
}