Examine source code of Everest North Face

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#5886b7",
      "tab_background_text": "#1e3859"
    }
  },
  "version": "2.0",
  "name": "Everest North Face",
  "manifest_version": 2,
  "description": "The north face of Mount Everest (Tibetan name Chomolungma) from the approach to the Rongbuk Glacier in Tibet."
}