Examine source code of Better YouTube Portrait Comments

{
  "manifest_version": 2,
  "name": "Better YouTube Portrait Comments",
  "version": "1.0.2",
  "description": "Makes the YouTube comments section a fixed, independently scrollable panel so you can read comments without scrolling the video as well in portrait screen orientation.",
  "author": "Shahrukh Abrar",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "browser-polyfill.js",
        "content.js"
      ],
      "css": [
        "comments.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon48.png"
    },
    "default_popup": "popup.html",
    "default_title": "Better YouTube Portrait Comments"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "abrarshahrukh@proton.me",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}