While you are surfing the Internet, malicious people or websites can get revealing information about you from your IP (Internet Protocol) address. The IP address is a set of numbers that an Internet Service Provider (ISP) assigns to a computer when it is using its service to connect to the Internet. The address marks the location of the computer. One way to protect your privacy is to hide the IP address of the computer. Do this in Mac OS by configuring the settings in web browsers such as Firefox and Safari.
Launch the browser. Click "Firefox" from the menu bar, then select "Preferences" from the drop-down menu. The Preferences dialogue window opens.
Click the "Advanced" icon, then click the "Network" tab. Click the "Settings" button in the "Configure how Firefox connects to the Internet" section. The "Configure Proxies to Access the Internet" dialogue box opens.
Click the check box next to "Manual proxy configuration" and "Use this proxy server for all protocols." Go to a free proxy website and enter the information from the site into the box next to "Web Proxy Server."
Type "Localhost, 127.0.0.1" in the "No Proxy for" open box, then click the "OK" button.
Launch the Safari web browser. Click "Safari" from the menu bar, then select "Preferences." The "Safari Preferences" dialogue window opens.
Click the "Advanced" icon, then click "Change Settings" in the "Proxies" box. The "Network" window opens.
Select "Manually" from the "Configure Proxies" drop-down box. Click the check boxes next to "Web Proxy (HTTP)" and "Secure Web Proxy (HTTPS)." Enter the server information from a free proxy website into the "Web Proxy Server" box.
Type "Localhost, 127.0.0.1" in the "Bypass proxy settings for these Hosts & Domains" box, then click "Apply now."