Examine source code of Basketball

{
  "name": "Basketball",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Basketball.png"
    },
    "colors": {
      "frame": "rgba(212, 151, 47, 1)",
      "tab_background_text": "rgba(87, 74, 74, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4500d395-fadf-44e9-8d7c-c85b29df9f86}"
    }
  }
}