Examine source code of Mandelbrot zoom

{
  "theme": {
    "images": {
      "theme_frame": "head.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Mandelbrot zoom",
  "manifest_version": 2,
  "description": "The Mandelbrot set fractal from -0.113762082748921-0.969312607351821i to -0.113762082712966-0.969312607354218i colored with a blue gradient."
}