Examine source code of Cookie Cleaner

{
  "manifest_version": 2,
  "name": "Cookie Cleaner",
  "version": "1.0",
  "description": "Clear cookies for the current website with one click.",
  "permissions": [
    "cookies",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{54b4affc-8f10-4f59-a237-cead4600634b}"
    }
  }
}