Examine source code of Angel Attack

{
  "theme": {
    "images": {
      "theme_frame": "Angelhead.jpg"
    },
    "colors": {
      "frame": "#dedada",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Angel Attack",
  "manifest_version": 2,
  "description": "Angel wielding sword flying down from the heavens.\nBlack text.\nAll the best.\nDay."
}