Examine source code of Abstract Angkor

{
  "theme": {
    "images": {
      "theme_frame": "firefoxangtop.jpg"
    },
    "colors": {
      "frame": "#ad5400",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Abstract Angkor",
  "manifest_version": 2,
  "description": "This was a picture of Angkor Wat I took. I played around with it in photoshop, and it turned out pretty nice."
}