Know why you are modifying your browser!

Its not always a safe thing to do!

Cross-Origin Resource Sharing (CORS)is a standard that allows a server to relax the same-origin policy. This is used to explicitly allow some cross-origin requests while rejecting others. For example, if a site offers an embeddable service, it may be necessary to relax certain restrictions. Setting up such a CORS configuration isn't necessarily easy and may present some challenges. In these pages, we'll look into some common CORS error messages and how to resolve them.

https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors