Examine source code of Foxstro

{
  "theme": {
    "images": {
      "theme_frame": "3000x200-rapstro-firefox-header.png"
    },
    "colors": {
      "frame": "#c9c9c9",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Foxstro",
  "manifest_version": 2,
  "description": "Rapstro - your favorite instrumental supplier, now with a little eye candy for your firefox skin!"
}