You don't always need an extension. Chrome's native (F12) has advanced features that mimic "tampering": Edit and replay XHR chrome/firefox etc? - Stack Overflow

: A robust tool for setting up rules to modify headers, redirect URLs, and mock API responses. It is highly popular among developers for its collaborative features and ease of use.

"Tamper Data" was once the gold standard for Firefox users to intercept and modify HTTP requests in real-time. However, for those looking for a "Tamper Data Chrome" equivalent, the landscape is slightly different due to Chrome's API restrictions. While there isn't a single direct port, several modern extensions and built-in tools offer even more powerful ways to inspect, edit, and replay web traffic. Top Alternatives to Tamper Data for Chrome

: Best for quick, simple header modifications. It lets you add, change, or remove request headers on the fly without complex setup.