Examine source code of Pdf Downloader

{
  "manifest_version": 2,
  "name": "Pdf Downloader",
  "description": "This extension parse a page and download any pdf links, giving you the option to name them",
  "version": "1.0",
  "browser_action": {
    "default_icon": "icon.png"
  },
  "background": {
    "matches": [
      "<all_urls>"
    ],
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "downloads"
  ]
}