Examine source code of robin singing

{
  "theme": {
    "images": {
      "theme_frame": "robinsinging.png"
    },
    "colors": {
      "frame": "#736455",
      "tab_background_text": "#f7e1ca"
    }
  },
  "version": "2.0",
  "name": "robin singing",
  "manifest_version": 2,
  "description": "robin rouge-gorge oiseau bird"
}