Examine source code of PDF Downloader

{
  "manifest_version": 2,
  "name": "PDF Downloader & CSV Generator",
  "version": "1.0",
  "description": "Downloads PDFs and generates a CSV with link titles.",
  "permissions": [
    "downloads",
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.jpg"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8eb5221b-7914-4355-843c-25aee3a442f4}"
    }
  }
}