Examine source code of robin flying

{
  "theme": {
    "images": {
      "theme_frame": "robinflying.png"
    },
    "colors": {
      "frame": "#133601",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "robin flying",
  "manifest_version": 2,
  "description": "oiseau-bird-robin-rouge-gorge-flying bird"
}