Examine source code of Miku Nakano

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Miku Nakano",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(181, 217, 237)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgba(255, 255, 255, 0.33)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(211, 77, 46)",
      "popup": "rgba(181, 217, 237, 0.25)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(211, 77, 46)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0c3b1e86-fdd5-4962-9c35-5389f41ecad0}"
    }
  }
}