Examine source code of Fleeting Gray Dream

{
  "theme": {
    "images": {
      "theme_frame": "firefoxheader2500.jpg"
    },
    "colors": {
      "frame": "#707070",
      "tab_background_text": "#d9d9d9"
    }
  },
  "version": "2.0",
  "name": "Fleeting Gray Dream",
  "manifest_version": 2,
  "description": "Took me a while. :D I got the idea from listening to Fireflies and Fuzzy Blue lights by Owl City. :3"
}