Examine source code of Radio Player & Search

{
  "manifest_version": 2,
  "name": "Radio Player & Search",
  "version": "1.0",
  "description": "Launch a simple radio player and perform web searches from your toolbar.",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a9f44081-c9c5-4f01-854c-2ce112cf1346}"
    }
  }
}