Examine source code of shadow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "shadow\\",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(157, 26, 26, 0.3)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(30, 30, 33)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(132, 49, 49, 0.57)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 13, 13)",
      "popup": "rgba(30, 30, 30, 0.81)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgba(218, 0, 0, 0.74)",
      "icons_attention": "rgba(255, 18, 18, 0.81)",
      "icons": "rgba(255, 255, 255, 0.81)",
      "ntp_background": "rgb(30, 30, 33)",
      "ntp_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 13, 13)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f5fc6533-e27c-42f3-968e-84410160810d}"
    }
  }
}