Examine source code of Hoot

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Hoot",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-008-60d2718f8c915b5ba09f31df5555b459.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(18, 16, 17)",
      "toolbar_text": "rgb(253, 188, 0)",
      "frame": "rgb(164, 180, 177)",
      "tab_background_text": "rgb(253, 188, 0)",
      "toolbar_field": "rgb(237, 234, 227)",
      "toolbar_field_text": "rgb(254, 105, 49)",
      "tab_line": "rgb(237, 234, 227)",
      "popup": "rgb(164, 180, 177)",
      "popup_text": "rgb(253, 188, 0)",
      "tab_loading": "rgb(237, 234, 227)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{06431151-d906-4e39-a768-17a188313cae}"
    }
  }
}