Examine source code of Sous bois

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Sous bois",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(253, 253, 253)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(253, 253, 253)",
      "toolbar_field": "rgba(225, 234, 239, 0)",
      "toolbar_field_text": "rgb(253, 253, 253)",
      "tab_line": "rgba(225, 234, 239, 0)",
      "popup": "rgba(0, 0, 0, 0.44)",
      "popup_text": "rgb(253, 253, 253)",
      "button_background_active": "rgb(0, 0, 0)",
      "icons_attention": "rgba(41, 21, 13, 0.78)",
      "ntp_background": "rgb(116, 115, 114)",
      "tab_selected": "rgba(41, 21, 13, 0.57)",
      "toolbar_vertical_separator": "rgba(41, 21, 13, 0.78)",
      "tab_loading": "rgba(225, 234, 239, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{095749d2-f080-48c6-89bb-4f931b6e0e76}"
    }
  }
}