Examine source code of Tab Cookie Remover

{
  "version": "0.1.1resigned1",
  "manifest_version": 2,
  "name": "Tab Cookie Remover",
  "short_name": "tabcookiermvr",
  "background": {
    "page": "lib/chrome/background.html"
  },
  "homepage_url": "http://mybrowseraddon.com/tab-cookie-remover.html",
  "description": "Remove all cookies for the active tab with just one click.",
  "permissions": [
    "tabs",
    "storage",
    "<all_urls>",
    "cookies",
    "notifications"
  ],
  "browser_action": {
    "default_title": "Tab Cookie Remover",
    "default_icon": {
      "16": "data/icons/16.png",
      "32": "data/icons/32.png",
      "48": "data/icons/48.png",
      "64": "data/icons/64.png"
    }
  },
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{60223f2a-86c6-4bdd-8a33-b5bb73139772}"
    }
  }
}