How to Check Proxy Settings on Mozilla Firefox

By Matt Hughes

A proxy server creates a protective barrier between an internal network, such as one run by a business or university, and the Internet. If a computer outside of the internal network needs to access information, the proxy server will prompt the computer for authorization, most often in the form of a user name and password, before granting access. The necessary settings are usually provided by the Network Administrator or Technical Support.

Check Proxy Settings in Mac OS X

Step 1

Click on "Go" and select "Applications." Locate and double-click on "Mozilla Firefox."

Step 2

Click on "Firefox" in the upper-left corner.

Step 3

Select "Preferences."

Step 4

Click on "Advanced" and select the Network tab.

Step 5

Click "Settings." Verify or set your proxy settings with those provided by your business or university.

Step 6

Click "OK" when finished and then "OK" again.

Check Proxy Settings in Windows

Step 1

Click "Start" and select "Programs." Click on "Mozilla Firefox," and then "Mozilla Firefox" to open the program.

Step 2

Click on "Tools" and select "Options."

Step 3

Click on "Advanced" and select the Network tab.

Step 4

Click "Settings." Verify or set your proxy settings with those provided by your business or university.

Step 5

Click "OK" when finished and then "OK" again.

Tips & Warnings

  • Some viruses or spyware may also setup a proxy to reroute traffic through their own computers. Knowing how to change or remove these settings can help restore your computer to normal usage.