Examine source code of Dirty Fox

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_optimized.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ff9500"
    }
  },
  "version": "2.0",
  "name": "Dirty Fox",
  "manifest_version": 2,
  "description": "A new Persona using Firefox's Logo -(c) by Mozilla-. It is easy to eyes, features a grunge style and transparency."
}