Netmirror Extension av Netmirror

Add, modify or remove a header for any request.
https://netmirr.net/
Netmirror Extension Mod Header (HTTP Headers) is an extension that can add, modify or remove an HTTP-request-header for all requests on a website or URL. This Addon is very useful if you are an App developer, website designer, or if you want to test a particular header for a request on a website.