Header Modifier

A minimal HTTP request-header editor. Click the toolbar icon to get a simple list: header name, value, and an on/off toggle per row. Type into the empty bottom row to add a header, duplicate or delete rows with one click, and leave a value empty to strip that header from requests entirely. The badge shows how many headers are active. Built on Chrome's declarativeNetRequest, so headers are applied by the browser's network stack itself: no content scripts, no proxies, and nothing leaves your machine. Settings persist locally and rules survive restarts.