Examine source code of Mount Diablo

{
  "theme": {
    "images": {
      "theme_frame": "personaMTDiablo.jpg"
    },
    "colors": {
      "frame": "#8f8f8f",
      "tab_background_text": "#454343"
    }
  },
  "version": "2.0",
  "name": "Mount Diablo",
  "manifest_version": 2,
  "description": "View of the Tri Valley from Mount Diablo"
}