Examine source code of Billy&I

{
  "theme": {
    "images": {
      "theme_frame": "layout.png"
    },
    "colors": {
      "frame": "#e80e7b",
      "tab_background_text": "#e80e7b"
    }
  },
  "version": "2.0",
  "name": "Billy&I",
  "manifest_version": 2,
  "description": "June 11 2010"
}