Examine source code of Cocktail day

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cocktail day",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(203, 236, 255, 0.4)",
      "toolbar_text": "rgb(255, 167, 0)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(58, 126, 255)",
      "toolbar_field": "rgba(203, 236, 255, 0.75)",
      "toolbar_field_text": "rgb(217, 54, 0)",
      "tab_line": "rgb(4, 201, 0)",
      "popup": "rgb(235, 255, 249)",
      "popup_text": "rgb(197, 0, 58)",
      "toolbar_field_border": "rgb(255, 255, 255)",
      "tab_loading": "rgb(4, 201, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e33b0f95-6445-45b5-bc76-9a089c9d0fac}"
    }
  }
}