Examine source code of Moon on Water

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Moon on Water",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.77)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(251, 251, 251, 0.21)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(214, 214, 214)",
      "popup_text": "rgb(0, 15, 1)",
      "toolbar_field_border": "rgb(146, 146, 146)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bb521033-cfd7-49f0-ae1d-b0304a5ee23c}"
    }
  }
}