Examine source code of Fauvette grisette

{
  "theme": {
    "images": {
      "theme_frame": "Fauvettegrisette.jpg"
    },
    "colors": {
      "frame": "#0015ff",
      "tab_background_text": "#4a3400"
    }
  },
  "version": "2.0",
  "name": "Fauvette grisette",
  "manifest_version": 2,
  "description": "Fauvette-bird-oiseau"
}