Examine source code of IG Grab

{
  "manifest_version": 3,
  "name": "IG Grab",
  "version": "2.2",
  "description": "Download Instagram photos, videos, and reels in highest quality. Multi-image posts saved as ZIP.",
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "activeTab",
    "downloads",
    "tabs",
    "webRequest",
    "storage",
    "notifications",
    "menus",
    "contextMenus"
  ],
  "host_permissions": [
    "*://*.instagram.com/*",
    "*://i.instagram.com/*",
    "*://*.cdninstagram.com/*",
    "*://*.fbcdn.net/*"
  ],
  "action": {
    "default_title": "IG Grab",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon-48.png",
      "96": "icon-96.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.instagram.com/*",
        "*://instagram.com/*"
      ],
      "js": [
        "content_feed.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ig-grab@local.dev",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}