To enable the settings for network pipelining, do the following:

1) In the Firefox address bar type: about:config and then hit Enter.
2) In the “Filter” search, type: pipelining.

You should see the following:

network.http.pipelining
network.http.pipelining.maxrequests
network.http.pipelining.ssl
network.http.proxy.pipelining

Set the first option to: true and second option to: 8. The SSL option you can set to true, if you want to use pipelining for secure sites and if you are using a proxy, you’ll want to set the fourth option to true as well to benefit from pipelining using a proxy server.