Examine source code of Realistic Colorful Clouds

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Realistic Colorful Clouds",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(146, 182, 192)",
      "toolbar_text": "rgb(0, 44, 57)",
      "frame": "rgb(98, 170, 255)",
      "tab_background_text": "rgb(0, 0, 50)",
      "toolbar_field": "rgb(105, 133, 149)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(82, 152, 171)",
      "popup_text": "rgb(140, 206, 215)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{064b746a-1d70-4db5-9bc1-85e937a70945}"
    }
  }
}