Changing User-Agent in XMLHttpRequest from a Chrome extension

Question

I\'m trying to send a HTTP request from a Extension in which I need to change the User-Agent.

My code looks like this:

function getXMLHttpRequest(met         


        

Answer 1

You can easily change the User-Agent header with the webRequest API.
For sample code, see Associate a custom user agent to a specific Google Chrome page/tab.

Take the code from that answer, and change "main_frame", "sub_frame" to "xmlhttprequest" to modify network requests initiated via XMLHttpRequest.

Obviously, to prevent deadlocks, this method does not work with synchronous requests ( i.e. when the third parameter of xhr.open is set to false).