How to Change Proxy Settings in Mozilla Firefox
The Mozilla Firefox web browser includes many features, such as quick bookmarks, tabbed windows, session restore, and the ability to browse the Web using a proxy address. A proxy stores information from Web pages in its own cache and shows you that information rather than sending you to the actual Web page. According to Mozilla.com, you can use proxies to improve security and filter content, and corporations often use them to protect their computer networks. To enable browsing by proxy in Mozilla Firefox, you must properly configure the browser to use a proxy address.
Open Mozilla Firefox and select "Tools" from the Firefox menu.
Select "Options" from the Tools menu. Firefox will start the Options panel, where you can configure the settings for Mozilla Firefox.
Click "Advanced" in the Options panel. Select the "Network" tab to see Firefox's network options.
Click "Settings" under the Network tab to view the configured connection settings for Mozilla Firefox. These options control how Firefox connects to the Internet.
Select "Manual Proxy Configuration" and input the proxy information you need to connect with. If you are unsure of the proxy information for your network, contact your network administrator.
Click "OK" to confirm your proxy settings. Click "OK" in the Options panel to close the configuration screen. You can now browse using your new proxy settings.