Examine source code of rufus the badger

{
  "theme": {
    "images": {
      "theme_frame": "browser-header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "rufus the badger",
  "manifest_version": 2,
  "description": "Rufus the badger! He's the coolest badger in town and he loves orange! Why not add him on facebook?"
}