Examine source code of Resident Evil firefox

{
  "theme": {
    "images": {
      "theme_frame": "Resident_evil95.jpg"
    },
    "colors": {
      "frame": "#873636",
      "tab_background_text": "#872727"
    }
  },
  "version": "2.0",
  "name": "Resident Evil firefox",
  "manifest_version": 2,
  "description": "Un tema para los amantes de Resident evil."
}