Examine source code of Zero borderlands 2

{
  "theme": {
    "images": {
      "theme_frame": "personaZero.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#fc0000"
    }
  },
  "version": "2.0",
  "name": "Zero borderlands 2",
  "manifest_version": 2,
  "description": "persona para Firefox sobre Borderlands 2 la nueva joya de Gearbox y Take2"
}