Examine source code of Supernatural John Gray

{
  "theme": {
    "images": {
      "theme_frame": "SupernaturalMozilaPersona4.png"
    },
    "colors": {
      "frame": "#fcf7f7",
      "tab_background_text": "#ada8a8"
    }
  },
  "version": "2.0",
  "name": "Supernatural John Gray",
  "manifest_version": 2,
  "description": "For every fan of Supernatural!"
}