Examine source code of Springsteen Portrait

{
  "theme": {
    "images": {
      "theme_frame": "SpringsteenPortrait.jpg"
    },
    "colors": {
      "frame": "#b8b8b8",
      "tab_background_text": "#b8b8b8"
    }
  },
  "version": "2.0",
  "name": "Springsteen Portrait",
  "manifest_version": 2,
  "description": "Bruce Springsteen, Wrecking Ball"
}