Examine source code of Psounion

{
  "theme": {
    "images": {
      "theme_frame": "psounion.jpg"
    },
    "colors": {
      "frame": "#2f90c4",
      "tab_background_text": "#080808"
    }
  },
  "version": "2.0",
  "name": "Psounion",
  "manifest_version": 2,
  "description": "A perfect day at Psounion, Greece with a view of the Temple of Poseidon and the vast clear sky above the sea"
}