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A firewall controls what programs can access the Internet. Find information about configuring your firewall to allow Firefox access to the Internet.

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}'''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.{/note} {for win} __TOC__ = Find out which firewall is installed = If you know which firewall or Internet security suite you are running, skip to [[#w_configuring-firewalls|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. <!--http://www.howtogeek.com/221283/what-is-different-about-the-windows-10-control-panel-so-far/ --> * '''Windows 7/8''': Find it under the Security section in Windows Action Center. For more information, see [http://windows.microsoft.com/en-US/windows7/What-is-Action-Center What is Action Center?] at microsoft.com. * '''Windows XP SP2 and SP3/Vista''': Find it under the Firewall section in Windows Security Center. For more information, see [http://windows.microsoft.com/en-US/windows-vista/Using-Windows-Security-Center Using Windows Security Center] at microsoft.com. 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: # Download [http://www.trolly.homepage.t-online.de/EnumProcess.exe Enum Process]. # After downloading, double-click {filepath EnumProcess.exe}. # Select {button Run}. # In the drop-down menu to the right, select '''Simple'''.<br/> <br/>[[Image:simple_enumprocess.PNG]]<br/> # Click {button List Processes}.<br/> <br/>[[Image:listprocesses_enumprocess.PNG]]<br/> {/for} = Configuring firewalls = {for win} * [https://answers.avira.com/en/question/how-can-i-unblock-an-application-in-avira-firewall-19 Avira Internet Security] '''Note:''' Current Avira products use Windows Firewall. For details, see [https://www.avira.com/en/support-for-home-knowledgebase-detail/kbid/1623 General Information regarding the Avira products] (Avira Knowledge Base). * [https://service.mcafee.com/faqdocument.aspx?id=TS100813 McAfee Security Center] (All McAfee Security Center Suites for Windows) * [http://support.antivirus.co.uk/trendmicro/kbresolution.jsp?hmid=48889&appId=11 Trend Micro Internet Security (Technical support)] * [[Configure Windows Firewall to allow Firefox access to the Internet|Windows Firewall]] {/for} {for mac} *[http://support.apple.com/kb/ht1810 Application Firewall] {/for} {for linux} Go to your distribution's firewall documentation. {/for}