Examine source code of Pool Day

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Pool Day 2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0)",
      "toolbar_text": "rgb(38, 61, 86)",
      "frame": "rgb(202, 228, 234)",
      "tab_background_text": "rgb(38, 61, 86)",
      "toolbar_field": "rgb(202, 228, 234)",
      "toolbar_field_text": "rgb(38, 61, 86)",
      "tab_line": "rgb(38, 61, 86)",
      "popup": "rgb(202, 228, 234)",
      "popup_text": "rgb(57, 85, 116)",
      "icons": "rgb(38, 61, 86)",
      "ntp_background": "rgb(202, 228, 234)",
      "popup_border": "rgba(38, 61, 86, 0)",
      "sidebar_border": "rgba(38, 61, 86, 0.24)",
      "sidebar_text": "rgb(38, 61, 86)",
      "sidebar": "rgb(202, 228, 234)",
      "tab_selected": "rgb(202, 228, 234)",
      "tab_text": "rgb(38, 61, 86)",
      "toolbar_bottom_separator": "rgba(38, 61, 86, 0)",
      "toolbar_field_border": "rgba(38, 61, 86, 0)",
      "toolbar_field_separator": "rgba(38, 61, 86, 0)",
      "toolbar_top_separator": "rgba(38, 61, 86, 0)",
      "toolbar_vertical_separator": "rgba(38, 61, 86, 0)",
      "tab_loading": "rgb(38, 61, 86)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{55b91f5d-3205-4447-97b5-2745a72e2aa1}"
    }
  }
}