Examine source code of big yello birdie

{
  "theme": {
    "images": {
      "theme_frame": "bigyellowbirdie.jpg"
    },
    "colors": {
      "frame": "#64b4f2",
      "tab_background_text": "#f7f439"
    }
  },
  "version": "2.0",
  "name": "big yello birdie",
  "manifest_version": 2,
  "description": "a big yellow bird flying"
}