Examine source code of Smiling Friends Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Smiling Friends",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0.19)",
      "toolbar_text": "rgb(213, 255, 215)",
      "frame": "rgb(49, 125, 121)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(247, 109, 106, 0.34)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(153, 245, 158)",
      "popup": "rgba(49, 125, 121, 0.8)",
      "popup_text": "rgb(253, 178, 245)",
      "button_background_hover": "rgba(252, 253, 125, 0.5)",
      "tab_loading": "rgb(153, 245, 158)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c24a2319-7828-43d1-8f89-802eb2e98cbc}"
    }
  }
}