Examine source code of Billiard-9-Ball

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_Billard.jpg"
    },
    "colors": {
      "frame": "#786767",
      "tab_background_text": "#f1f2e9"
    }
  },
  "version": "2.0",
  "name": "Billiard-9-Ball",
  "manifest_version": 2,
  "description": "Its my first Billiard Persona. It shows a cue, and the 9 Ball"
}