Examine source code of Jimmy Buffett

{
  "theme": {
    "images": {
      "theme_frame": "jb_background1.jpg"
    },
    "colors": {
      "frame": "#0fcadb",
      "tab_background_text": "#18690c"
    }
  },
  "version": "2.0",
  "name": "Jimmy Buffett",
  "manifest_version": 2,
  "description": "For all those Parrotheads out there :D"
}