Examine source code of Rabbit URL Opener

{
  "name": "Rabbit URL Opener",
  "version": "1.0",
  "manifest_version": 2,
  "author": "Rahul Digital",
  "description": "Rabbit URL Opener - Bulk URL Opener Extension just lets you open multiple URLs at once",
  "icons": {
    "48": "bulkurlopener48.png"
  },
  "browser_action": {
    "default_popup": "mozilla_cool_opener.html",
    "default_icon": "bulkurlopener19.png"
  },
  "permissions": [
    "tabs",
    "<all_urls>",
    "clipboardRead",
    "clipboardWrite",
    "activeTab",
    "storage"
  ]
}