Examine source code of Manga Clouds Drawing

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Colorful Clouds Drawing",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(2, 110, 148)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 67, 134)",
      "tab_background_text": "rgb(233, 243, 255)",
      "toolbar_field": "rgb(55, 81, 119)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(62, 69, 145)",
      "popup_text": "rgb(215, 226, 239)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{53c8fa76-bd73-4721-b70f-d25ace7d9b75}"
    }
  }
}