Examine source code of Moon over Stonehenge

{
  "theme": {
    "images": {
      "theme_frame": "StonehengeSunset1.jpg"
    },
    "colors": {
      "frame": "#827e7e",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Moon over Stonehenge",
  "manifest_version": 2,
  "description": "Stonehenge. Built between 3100-1100 BC. It is estimated that 30 MILLION hours of labour went into its construction, but it's precise purpose and who built it remains a mystery."
}