Examine source code of Pink Feather

{
  "name": "Pink Feather",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Pink Feather.jpg"
    },
    "colors": {
      "frame": "rgba(19, 19, 20, 1)",
      "tab_background_text": "rgba(125, 21, 130, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_field": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d33f3e78-02dd-454e-9d55-f91847d97f00}"
    }
  }
}