Examine source code of Windows Error Screen

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Windows Error Screen",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(225, 234, 239)",
      "toolbar_text": "rgb(248, 112, 140)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(251, 3, 3)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 12, 255)",
      "tab_line": "rgb(255, 0, 53)",
      "popup": "rgb(255, 6, 0)",
      "popup_text": "rgb(0, 255, 6)",
      "tab_loading": "rgb(255, 0, 53)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8e9be41a-202f-4c88-a5e7-1841fe6f393e}"
    }
  }
}