You cannot use IE11. You cannot use old Chrome 49. Here is what actually works:
| Browser | Version Tested | Vercel App Success? | Notes |
| :--- | :--- | :--- | :--- |
| Firefox ESR | 115.13+ | ✅ Yes | The only reliable option. |
| Supermium | 122+ | ✅ Yes | Chromium backport. Needs --ignore-certificate-errors sometimes. |
| Opera | 36 (Old) | ❌ No | TLS handshake fails. | windows 7 vercel app
Winner: Firefox ESR 115. It still receives security updates on Windows 7 and handles modern JS reasonably well. You cannot use IE11
export default function Home()
return (
<div>
<h1>Deployed from Windows 7!</h1>
<p>This app runs on Vercel via legacy Node.js 14.</p>
</div>
)
mkdir my-windows7-vercel-app
cd my-windows7-vercel-app
npm init -y
npm install next@12 react@17 react-dom@17
Why these specific versions? Next.js 12 is the last major version fully compatible with Node.js 14. Next.js 13+ requires Node.js 16. Why these specific versions