Examine source code of Piano Rose by MaDonna

{
  "name": "Piano Rose by MaDonna",
  "manifest_version": 2,
  "version": "2.1resigned1",
  "theme": {
    "images": {
      "theme_frame": "PianoRoseH3jpg.jpg"
    },
    "colors": {
      "frame": "rgba(204, 182, 202, 0)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d003ebf-2be8-43b6-b49e-84b723aea3fa}"
    }
  }
}