Why does a CORS extension break in production?
Because production users do not have your extension. If your app only works with the extension enabled, it is broken for everyone else. The proxy approach works the same in development and production.
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More FAQs in CORS Browser Extension vs Proxy: Which Should You Use While Developing React?
Use a proxy for real development. A CORS extension is fine for a quick one-off test, but it is not a real fix, does not mirror production, and must never be used in production or asked of users.
Because it works instantly with one click and unblocks everything immediately. The danger is getting used to it and never switching to a proper fix, which leaves you thinking your app works when it does not for real users.
Because it routes the request through a server-side origin, works reliably across your team, mirrors how production works, and does not rely on disabling a security feature. It teaches you the real fix.
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