Configure firewalls so that Firefox can access the Internet

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A personal firewall is a security program that oversees all of your computer's connections to the Internet. It may be included as part of an Internet security suite, or it may be a free-standing program. Most personal firewalls will deny Internet access to any program, or a new version of any program, unless you have specifically allowed access. This article will help you find information about configuring your firewall to work with Firefox.

Note: In some cases, disabling an Internet security program or firewall does not stop all of its parts from being active. A program that reports that it is disabled may still be able to block Firefox.

Find out which firewall is installed

If you know which firewall or Internet security suite you are running, skip to the next section.

Depending on your Windows version, do the following:

  • Windows 10: Find it in Windows Control Panel, Security and Maintenance under the Security section.
  • Windows 7/8: Find it under the Security section in Windows Action Center. For more information, see What is Action Center? at
  • Windows XP SP2 and SP3/Vista: Find it under the Firewall section in Windows Security Center. For more information, see Using Windows Security Center at

If you can't still detect your firewall with the above steps, try to run Enum Process (not created by Mozilla) that is an application that detects many common firewalls:

  1. Download Enum Process.
  2. After downloading, double-click EnumProcess.exe.
  3. Select Run.
  4. In the drop-down menu to the right, select Simple.

  5. Click List Processes.


Configuring firewalls

Refer to the Apple documentation.

Go to your distribution's firewall documentation.

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