Examine source code of Field and road

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Field and road",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(200, 225, 225, 0.5)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(8, 102, 50)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(247, 255, 239, 0.5)",
      "toolbar_field_text": "rgb(5, 66, 0)",
      "tab_line": "rgb(255, 162, 0)",
      "popup": "rgb(244, 237, 227)",
      "popup_text": "rgb(8, 102, 50)",
      "ntp_background": "rgb(202, 223, 195)",
      "tab_loading": "rgb(255, 162, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{05d18c25-6ece-4df2-a3f7-02705386fe93}"
    }
  }
}