Internet Explorer : Navigate to Start > Run, type: regedit , find the following locations and add the DWORD values: HKEY_USERS.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings "MaxConnectionsPerServer"=dword:00000010 "MaxConnectionsPer1_0Server"=dword:00000010 HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings "MaxConnectionsPerServer"=dword:00000010 "MaxConnectionsPer1_0Server"=dword:00000010 Firefox : Pipelining requests : 1. In the address bar, type: about:config 2. Locate and change the following values (by double-clicking on them): network.http.max-connections = 24 (default is 24) network.http.max-connections-per-server = 10 (default is 8) network.http.max-persistent-connections-per-proxy = 8 (default is 4) network.http.max-persistent-connections-per-server = 4 (default is 2) network.http.pipelining = true (default is false) network.http.pipelining.maxrequests = 10 ( default is 4) network.http.proxy.pipelining = true (default is false) Reduce Initial Page Delay : By default, Firefox waits 0.25 seconds (250ms) before beginning to draw web pages. To reduce this initial delay, do the following: 1. In the browser address bar, type: about:config 2. Anywhere in the browser window, right-click and create: NEW > String 3. Name the string: nglayout.initialpaint.delay (no spaces) and set its value to 0 (or something sensible, in milliseconds). Note: This setting is not present by default. All Firefox about:config entries with descriptions and defaults I found a similiar thread for FF : http://www.namepros.com/86199-make-firefox-faster-2.html ====================================================== Notes: Keep in mind that setting those values exceed the HTTP RFC specs. Increasing the number of concurrent connections over 10 may cause problems with some websites not completely loading, or dropping/retransmitting some requests. If you experience problems, just reduce the numbers to a lower value, or remove the settings above to return to the Windows defaults (4 and 2 concurrent connections).