Examine source code of Night Flame

{
  "name": "Night Flame",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "pexels-pixabay-355465.jpg"
    },
    "colors": {
      "frame": "rgba(15, 33, 74, 1)",
      "tab_background_text": "rgba(250, 250, 250, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dbb22af8-d5c1-4e33-929d-a11dfe37378b}"
    }
  }
}