Examine source code of Pyramids at sunset

{
  "theme": {
    "images": {
      "theme_frame": "pyramids_ghiza.png"
    },
    "colors": {
      "frame": "#521515",
      "tab_background_text": "#fcfbca"
    }
  },
  "version": "2.0",
  "name": "Pyramids at sunset",
  "manifest_version": 2,
  "description": "Pyramids of Ghiza viewed from the desert"
}