Examine source code of Supernatural Pin Board

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Supernatural",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(179, 168, 150, 0.73)",
      "toolbar_text": "rgb(72, 79, 78)",
      "frame": "rgb(23, 17, 6)",
      "tab_background_text": "rgb(209, 202, 190)",
      "toolbar_field": "rgba(133, 111, 74, 0.73)",
      "toolbar_field_text": "rgb(59, 45, 20)",
      "tab_line": "rgb(89, 97, 57)",
      "popup": "rgb(209, 202, 190)",
      "popup_text": "rgb(59, 45, 20)",
      "tab_selected": "rgba(179, 168, 150, 0.81)",
      "tab_text": "rgb(89, 97, 57)",
      "tab_loading": "rgb(89, 97, 57)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{772616ba-87a6-4028-a48f-52a6fd5e9aa9}"
    }
  }
}