Examine source code of Pillow

{
  "name": "Pillow",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1000183715.jpg"
    },
    "colors": {
      "frame": "rgba(17, 189, 69, 1)",
      "tab_background_text": "rgba(230, 123, 16, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d76b00a-c032-44b8-b868-8c7a29e7c3c7}"
    }
  }
}