Examine source code of Flying Things In Space

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#120f0f",
      "tab_background_text": "#edd0d0"
    }
  },
  "version": "2.0",
  "name": "Flying Things In Space",
  "manifest_version": 2,
  "description": "This was made with Mandelbulb and post work done with Photofiltre and Paint.Net.."
}