This extension can edit http headers..
http request headers chrome
Intercept Requests and add custom rules to modify request/response headers, block/redirect requests, modify query params.
modify http
Simple Modify headers
Modifies HTTP headers on the fly.
Add, modify or remove a header for any request on desired domains.
Web Debugging Proxy to Intercept & Modify HTTPs Requests - Redirect URL, Modify Headers, Mock APIs, Modify Response, Insert Scripts
Displays the current tab’s HTTP request and response or a Live HTTP Headers tab showing a stream of requests and responses.
Add, remove, or modify HTTP Headers for any request based on a regular expression
Chrome extension that allows the inspection of security aspects of a site's HTTP headers, cookies and other key security settings.
Extension for modifying headers