Examine source code of Review Scraper 2.0

{
  "manifest_version": 2,
  "name": "Review Scraper",
  "version": "1.0.0",
  "description": "Scrapes Amazon & Flipkart product reviews and saves them to text file",
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "clipboardWrite",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.com/*",
        "https://amazon.com/*",
        "https://www.amazon.in/*",
        "https://amazon.in/*",
        "https://www.flipkart.com/*",
        "https://flipkart.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Review Scraper"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4c432a1d-1dee-4869-a281-e5a7f33d158a}"
    }
  }
}