HeaderControl

Header Control lets you add, override, and remove HTTP headers on requests and responses - organized into named profiles you can flip on or off independently.

It's built on Chrome's declarativeNetRequest API rather than the older webRequest approach, so header rules are enforced natively by Chrome. The extension's own code is never in the request path and never reads your traffic.

WHAT YOU CAN DO

- Create multiple profiles, each with its own URL pattern, header rules, and on/off switch

- Set, append, or remove individual request headers

- Set, append, or remove individual response headers - useful for CORS testing, cache-control overrides, and similar