Add, modify and filter http request headers. You can modify the user agent string, add headers to spoof a mobile request (e.g. x-up-calling-line-id) and much more. Take a look at the help tab of the Modify Headers window...
Long Description
Add, modify and filter http request headers. You can modify the user-agent string, add headers to spoof a mobile request (e.g. x-up-calling-line-id) and much more. Take a look at the help tab of the Modify Headers window.
Some people think that 'user-agent' is a custom way of specifying the user agent string. This is not true, for a guide on this and other HTTP request headers, look at this W3C page: http://www.w3.org/Protocols/HTTP/HTRQ_Headers.html
Please DO NOT post support requests or issues here. To make suggestions or report issues, please go to http://modifyheaders.mozdev.org/bugs.html
https://addons.mozilla.org/en-US/firefox/addon/967
