Examine source code of The Other Fox

{
  "theme": {
    "images": {
      "theme_frame": "The_Other_Fox_1.jpg"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#333333"
    }
  },
  "version": "2.0",
  "name": "The Other Fox",
  "manifest_version": 2,
  "description": "Better render with the main toolbar hidden."
}