HTTPS pages don’t open in Mozilla Firefox when Kaspersky Security 10 for Windows Server is running

Latest update: February 11, 2021 ID: 14415
This article concerns Kaspersky Security 10.1 for Windows Server.

The Mozilla Firefox browser blocks HTTPS pages from loading if they are processed by the Traffic Security component.


By default, Mozilla Firefox doesn’t trust connections that are signed by a root certificate from the Microsoft Windows storage. 


In order for the browser to trust web resources processed by the Traffic Security component, do the following:

  1. In the Mozilla Firefox address bar, enter about:config.
  2. Click Accept the Risk and Continue.

 About:config command in Mozilla Firefox

  1. In the search field, enter security.enterprise_roots.enabled.
  2. Click Toggle button in Mozilla Firefox to toggle the value to true.

Setting the security.enterprise_roots.enabled value to true in Mozilla Firefox

  1. Make sure that the value of the string is true.  

Checking the value security.enterprise_roots.enabled in Mozilla Firefox

If you cannot edit the security.enterprise_roots.enabled value, check Mozilla Firefox group security policies and configuration files in the defaults\pref folder.

The string value will be set to true. The browser will now trust root certificates from the Microsoft Windows storage. HTTPS traffic will not be blocked.

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