Examine source code of Firefox Power Ultimate

{
  "theme": {
    "images": {
      "theme_frame": "Header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#feffc7"
    }
  },
  "version": "2.0",
  "name": "Firefox Power Ultimate",
  "manifest_version": 2,
  "description": "A nice vibrant red/orange firefox theme, with some glowing streaks.\n\nVery powerful colors, overall a very nice strong theme."
}