Examine source code of Yume Nikki Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Yume Nikki Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(153, 59, 25)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(106, 32, 5)",
      "tab_background_text": "rgb(149, 0, 59)",
      "toolbar_field": "rgb(250, 215, 190)",
      "toolbar_field_text": "rgb(193, 0, 0)",
      "tab_line": "rgb(255, 142, 144)",
      "popup": "rgb(255, 10, 0)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 142, 144)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e8d47889-7d6f-45dc-8aa2-aa0fafdffecb}"
    }
  }
}