Examine source code of Sinner's Web!!

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Sinner's Pen",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top",
        "right bottom",
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(33, 13, 47)",
      "toolbar_text": "rgb(254, 50, 127)",
      "frame": "rgb(14, 7, 29)",
      "tab_background_text": "rgb(108, 18, 71)",
      "toolbar_field": "rgb(108, 18, 71)",
      "toolbar_field_text": "rgb(167, 23, 97)",
      "tab_line": "rgb(254, 50, 127)",
      "popup": "rgb(167, 23, 97)",
      "popup_text": "rgb(254, 50, 127)",
      "tab_loading": "rgb(254, 50, 127)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{75883b00-a9e6-4253-8478-aa4a3637b8df}"
    }
  }
}