Examine source code of Wiccan Devil

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Wiccan Devil",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.24)",
      "toolbar_text": "rgb(162, 26, 53)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(253, 253, 253)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(161, 162, 166)",
      "tab_line": "rgb(88, 79, 81)",
      "popup": "rgb(4, 4, 4)",
      "popup_text": "rgb(126, 126, 136)",
      "tab_loading": "rgb(88, 79, 81)"
    }
  }
}