You might as well tweak your network settings while you are in
Filter keyword: network
the tweak the following settings ..
network.http.pipelining (change to TRUE)
network.http.pipelining.maxrequests (set to 10)
What this does in a nutshell, is turn on Http (web) pipelining so you can have more then one connection to a website, The second setting specifies that you want it to ask for (MAX) 10 connections to a host. This will result (if the provider supports more then 1 connection) that you are able to download ..say 10 parts of the website at a time. Keep in mind it does not work for all websites.