Examine source code of webpage notes

{
  "manifest_version": 2,
  "name": "Tabs description",
  "version": "1.1",
  "browser_action": {
    "default_title": "Tabs description",
    "default_popup": "popup.html"
  },
  "icons": {
    "128": "328.png"
  },
  "permissions": [
    "tabs",
    "activeTab"
  ]
}