Examine source code of Sun burst

{
  "theme": {
    "images": {
      "theme_frame": "firefoxheadersun1.jpg"
    },
    "colors": {
      "frame": "#faf7f7",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Sun burst",
  "manifest_version": 2,
  "description": "a transcendence of colour, a beautiful abstract sunrise/set"
}