Data on your server were changed, or money were sent. They will be treated as simple! By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. To remove the SOP restriction developers use a special header-based mechanism called Cross-Origin Resource Sharing (CORS). There is nothing wrong with your code, but most likely the API endpoint the code trying to reach is not setup for JavaScript web app. Does activating the pump in a vacuum chamber produce movement of the air inside? make a credit card transaction) and only then verify access. To learn more, see our tips on writing great answers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Developers start earning good money on development start working in big companies or at freelance find a a client with growing buisness. If you need to set a header by yourself still, and still wish to keep the request simple you are allowed to white-listed request headers and their values, they called CORS-safelisted. Russians ruthlessly kill all civilians in Ukraine including childs and destroy their cities. How to help a successful high schooler who is failing in college? Imagine a browser requests a font or calls some REST API by using JavaScript from a page served on a.com. ACMA say browser that it can remember preflight for some seconds value, e.g. No 'Access-Control-Allow-Origin' header is present on the requested resource. and the backend is already configured for CORS and my old manifest version 2 extension is working fine up to date for the same backend using XMLHttpRequest as I mentioned in my question. None of that work in Edge. This happens for almost all of the s3-hosted images. This problem bothers us so much, does anyone know any action we can do to solve issue? Temporary workaround uses this option. Chrome 103 is released, maybe it will fix the issue. None of the other solutions worked. LLPSI: "Marcus Quintum ad terram cadere uidet. ACAM and ACAH headers in response will say browser can it do actual method or not. You are using ANY Method with Authentication for routes and lambda integration; You believe you have configured the CORS properly. Of course it would probably be easier to just use middleware for this. I would say it should never happen to you. Why does my http://localhost CORS origin not work? The "Access-Control-Allow-Origin" header are set as "*" in the backend code. To understand the reason, you should know two important facts: So if you allow application/x-www-form-urlencoded then hacker might place a