Examine source code of Star Girl

{
  "name": "Star Girl",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "star-girl-v2.png"
    },
    "colors": {
      "frame": "rgba(39, 189, 194, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(148, 148, 148, 0.4)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(252, 193, 171, 0.46)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(252, 66, 255, 0.51)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7dfe50db-3431-4104-8b4a-953237370023}"
    }
  }
}