Examine source code of silvith_firefly

{
  "theme": {
    "images": {
      "theme_frame": "silvith_fireflies.png"
    },
    "colors": {
      "frame": "#001100",
      "tab_background_text": "#000500"
    }
  },
  "version": "2.0",
  "name": "silvith_firefly",
  "manifest_version": 2,
  "description": "Fireflies on a dark green and black background"
}