Is a CORS extension ever acceptable?
Only for one-off tests of around 30 seconds. Disable it immediately afterward so you do not fool yourself into thinking your app works when it does not for real users.
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More FAQs in Why a CORS Browser Extension Is Not a Real Fix (and What to Do Instead)
Because it only disables CORS in your browser. Every other user, including your team and production users, does not have it. Your app is still broken for them. The extension hides the real problem instead of solving it.
No. Production has no extension. If your app only works with the extension enabled, it will break the moment you deploy. Testing with the extension gives you false confidence.
Set up a proxy for development, route API calls through your backend in production, and if you control the API, set the right CORS headers. These fixes work for everyone, not just you.
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