Examine source code of Simple Radiohead

{
  "theme": {
    "images": {
      "theme_frame": "rad_top.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Simple Radiohead",
  "manifest_version": 2,
  "description": "Just a simple Radiohead theme. OK Computer on top, Hail to the Thief on bottom."
}