Examine source code of Sherlock Cumberbatch

{
  "theme": {
    "images": {
      "theme_frame": "sherlock4.png"
    },
    "colors": {
      "frame": "#3b3939",
      "tab_background_text": "#010008"
    }
  },
  "version": "2.0",
  "name": "Sherlock Cumberbatch",
  "manifest_version": 2,
  "description": "for all lovers of the bbc Sherlock drama..."
}