I'm seeing that some of you use links2 with Tor. I do so as well, and I have been able to mask my browser as the firefox based Tor Browser. This includes changing the HTTP headers as well. Here is my script, save it in your /usr/local/bin directory. You can use websites such as ip-check.info and browserspy.dk to see whether the browser is masked or not.

#!/bin/bash

/usr/bin/links2 -address-preference 3 -async-dns 1 -http-bugs.bug-no-accept-charset 1 -http-bugs.no-compression 0 -http.do-not-track 1 -http.extra-header "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\Accept-Language: en-US,en;q=0.5\Accept-Encoding: gzip, deflate\Connection: keep-alive" -http.fake-user-agent "Mozilla/5.0 (Windows NT 6.1; rv:45.0) Gecko/20100101 Firefox/45.0" -http.referer 1 -ftp-proxy 127.0.0.1:9050 -socks-proxy 127.0.0.1:9050 -only-proxies 1 -save-url-history 0 -smb.allow-hyperlinks-to-smb 0 https://check.torproject.org