CORS Browser Extension vs Proxy: Which Should You Use While Developing React?

CORS Browser Extension vs Proxy: Which Should You Use While Developing React?

When CORS blocks your React app in development, two options come up: a browser extension that disables CORS, or a proxy. Here is which to use and why.

The Browser Extension

A CORS extension disables the browser's CORS enforcement for your requests. It works instantly and is fine for a quick test. It is not a real fix and must never be used in production.

The Proxy

A proxy routes your request through a server-side origin, bypassing browser CORS entirely. It works reliably and is the correct approach for any real development setup.

Why the Extension Is Tempting

It takes one click and unblocks everything immediately. For a single test, it is convenient. The problem is that people get used to it and never switch to a proper fix.

Why the Proxy Is Correct

It mirrors how production works, it works across your team regardless of extensions, and it does not rely on disabling a security feature. It is the fix that actually teaches you something.

When to Use the Extension

For one-off testing when you just want to see a response quickly. Remove it or disable it afterward so you do not fool yourself into thinking your app works when it does not.

Why the Extension Never Belongs in Production

Production users do not have your extension. If your app only works with the extension, it is broken. The proxy approach works the same in development and production.

The Takeaway

Use the extension only for quick one-off tests. Use a proxy for any real development, because it works reliably, mirrors production, and does not rely on disabling a security feature.