Examine source code of Tiger_Persona

{
  "theme": {
    "images": {
      "theme_frame": "Tiger.jpg"
    },
    "colors": {
      "frame": "#43594e",
      "tab_background_text": "#590808"
    }
  },
  "version": "2.0",
  "name": "Tiger_Persona",
  "manifest_version": 2,
  "description": "From my old disco-poster ... it should glow in the dark under UV-light. I shoot it with digital-camera and edited with GIMP-program."
}