Examine source code of LAN File Transfer

{
  "manifest_version": 2,
  "name": "LAN File Transfer",
  "version": "1.0.0",
  "description": "Transfer files directly between browsers on the same local network — no internet, no cloud, no USB. Peer-to-peer via WebRTC.",
  "browser_specific_settings": {
    "gecko": {
      "id": "lan-file-transfer@rohityadav",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "LAN File Transfer",
    "default_popup": "popup/popup.html"
  },
  "sidebar_action": {
    "default_title": "LAN File Transfer",
    "default_panel": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
    }
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "permissions": [
    "storage",
    "notifications"
  ]
}