Examine source code of Simple Foxer

{
  "theme": {
    "images": {
      "theme_frame": "FireFoxPersona1.jpg"
    },
    "colors": {
      "frame": "#050404",
      "tab_background_text": "#d49d1b"
    }
  },
  "version": "2.0",
  "name": "Simple Foxer",
  "manifest_version": 2,
  "description": "A simple design I'm trying as my first design."
}