HackTrick

This next group of hacks all relate to the network.http group in about:config. Basically these various options open up your network connection to Firefox, permitting it to access information online as quickly as your connection will permit you. Since the majority of readers utilize broadband connections, this will benefit you, but people using dial up modems (56k) this is not going to benefit you much, sorry. To implement these hacks, perform the following steps.

1. With Firefox up and running, type about:config and hit enter.
2a. Find the entry called “network.http.pipelining” and set it to “true”.
2b. Find the entry called “network.http.proxy.pipelining” and set it to “true”.
2c. Find the entry called “network.http.pipelining.maxrequests” and set it to 16-32, but beware, if set too high you may risk banning yourself from various servers by being mistaken for a DoS attack.
3. Restart your browser.
Result:With these options enabled, webpages load faster, pictures in particular. When I went to Flickr.com and started clicking around, all the pictures loaded at one time unlike how it used to load one picture at a time.