Examine source code of Youtube Video Summarizer

{
  "manifest_version": 2,
  "name": "Youtube Video Summarizer",
  "version": "2.1",
  "description": "Summarize Youtube videos & Web Pages using Gemini, ChatGPT or Grok",
  "browser_specific_settings": {
    "gecko": {
      "id": "{15a052da-98e7-4cb4-a655-f11bd0edc9e3}"
    }
  },
  "permissions": [
    "tabs",
    "activeTab",
    "contextMenus",
    "storage",
    "https://gemini.google.com/*"
  ],
  "browser_action": {
    "default_title": "Summarize Youtube Video",
    "default_icon": {
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}