How to fake IP in firefox, IE, google chrome

Firefox:

go to Tools> Options> Advanced tab> select the Network tab> click the Settings button> select Manual proxy configuration in the Connection Settings window that appears, enter the IP address and Port above as shown below and then click the OK button.

Internet Explorer:

Chrome:

Notes: 

1. After this, if you do not want to use a proxy, you choose No proxy in the Connection Settings window, then click the OK button.
2. Choose the exact protocol.