Resource Override is a powerful Chrome extension designed to enhance user control over web content. This free tool allows users to redirect traffic, replace existing content, and insert new elements on any website, making it ideal for web developers and testers. Its newly added feature for modifying request and response headers includes common presets such as enabling CORS, allowing iframes, and more, further expanding its utility for managing web interactions.

With its ability to redirect URLs before requests are made, Resource Override also enables users to point to text documents created within the extension. For those needing to inject JavaScript or CSS, this extension provides a seamless solution. It is particularly useful for debugging production websites, as users can easily edit and inject code without the hassle of navigating through minified scripts.