Examine source code of Firefox Black Dust

{
  "theme": {
    "images": {
      "theme_frame": "ff_black_dust_header.jpg"
    },
    "colors": {
      "frame": "#545454",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Firefox Black Dust",
  "manifest_version": 2,
  "description": "Textured black/grey fade with a menu glass effect. Good when used with Vertical Side bar."
}