modifying google chrome and mozilla firefox

How to change Google Chrome
3.x proxy settings
-Click on the spanner toolbar
-Select options
-Click on under the hood tab
-Click on change proxy settings
button
--If you are using LAN, click "LAN
Settings" button. If you are
using Dial-up or Virtual Private
Network connection, select
necessary connection and click
"Settings" button.
-Make sure the "automatically
detect proxy settings" and "use
a proxy automatic configuration
script" options are not checked.
-In the "Proxy Server" area, click
the check box next to Use a
proxy server for this
connection.
-If necessary, enable "bypass
proxy server for local
addresses".
-Click the "Advanced" button and
set Proxy Server address
(proxy IP), proxy server port.
-Click OK.


Changing your setting in mozilla
firefox
-Goto Tools, then Options.
-Click on "Advanced" tab.
-Select "Network" tab.
-Click "Settings" button in the
"Connections" area.
-Select the Manual Proxy
Configuration radio button.
-In the necessary proxy field(s),
set Proxy Server address
(proxy IP) and proxy
configuration port.
==>Internet Explorer 7.0 manuall
proxy settings<==
-Go to Tools, then Internet
Options.
-Click on the Connections tab.
-If you are using LAN, click "LAN
Settings" button. If you are
using Dial-up or Virtual Private
Network connection, select
necessary connection and click
"Settings" button.
-Make sure the "automatically
detect proxy settings" and "use
a proxy automatic configuration
script" options are not checked.
-In the "Proxy Server" area, click
the check box next to Use a
proxy server for this
connection.
-If necessary, enable "bypass
proxy server for local
addresses".
-Click the "Advanced" button and
set Proxy Server address
(proxy IP), proxy server port.
-Click OK.