How to Disable the Enterprise Roots Preference

Changing hidden settings can affect Firefox's stability and security. This is recommended for advanced users only.

Firefox may display a TLS connection error when your antivirus software prevents data from being sent to your browser. This happens when your antivirus software fails to register itself with Firefox as a valid issuer of TLS certificates.

Mozilla has added the Enterprise Roots preference to Firefox as a solution to the problem. This preference can be used to import any root certificate authorities (CAs) that have been added to the operating system to resolve your TLS connection error. You can determine if a website is relying on an imported root by clicking the Information icon from the address bar.

With Firefox version 68, when a TLS connection error occurs, Firefox automatically enables the Enterprise Roots preference and attempts to connect again. If the issue is resolved, then the Enterprise Roots preference remains enabled. However, you may want to disable this behavior, so this article explains how to do just that without compromising security.

To modify this behavior and prevent Firefox from automatically enabling the import of CAs that have been added to the operating system when a TLS connection error occurs:

  1. In the address bar, type about:config and press EnterReturn.

    • The about:config "This might void your warranty!" warning page may appear. Click I accept the risk! to continue to the about:config page.
    A list of preferences displays.
  2. Scroll down and double-click on security.certerrors.mitm.auto_enable_enterprise_roots.

    False now displays in the Value column for the security.certerrors.mitm.auto_enable_enterprise_roots preference.


To prevent CAs that have been added to the operating system from being automatically imported each time Firefox restarts:

  1. In the address bar, type about:config and press EnterReturn.

    • The about:config "This might void your warranty!" warning page may appear. Click I accept the risk! to continue to the about:config page.
    A list of preferences displays.
  2. Scroll down and double-click on security.enterprise_roots.enabled.

    False now displays in the Value column for the security.enterprise_roots.enabled preference.
// Estas pessoas maravilhosas ajudaram a escrever este artigo:Lamont Gardenhire. Você também pode ajudar - descubra como.

Este artigo foi útil? Por favor, aguarde...

Colabore no Apoio da Mozilla