Examine source code of URL Extractor

{
  "manifest_version": 2,
  "name": "URL Extractor",
  "version": "3.0",
  "description": "Extract and manage URLs from webpages with a modern design",
  "permissions": [
    "activeTab",
    "storage",
    "downloads",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "urlextractor@yourdomain.com"
    }
  }
}