Here's a tweak I got the other day.

I noticed it increased the speed on my FireFox when it loads pages.
[quote][b]Make Your FireFox Load Faster[/b]
[i]This tweak makes your FF browser load pages faster[/i].
1. Open FireFox and type [b]about:config[/b] on the URL.
2. Type [b]network[/b].
3. Look for [b]network.http.pipelining[/b].
4. Double click it, and change from [i]false[/i] to [b]true[/b].
5. Find [b]network.http.pipelining.maxrequests[/b].
6. Right-click, click [b]Modify[/b], and change value from [i]4[/i] to [b]10[/b].[/quote]
[b]Video Tutorial:
http://www.5min.com/Video/How-to-boost-firefox-speed-4103[/b]