Level 54
Content Creator
FI, unrelated to the above, FF 78 supports the detection of MITM attack feature in a software


Firefox may detect if software on a device uses MITM (Man in the Middle) implementations. Security software may use it and this may lead to security and loading issues on the Internet.

Firefox 78 Stable supports the detection of MITM if it is causing connection issues, whereas Firefox ESR 78 does not by default. If the stable version of Firefox suspects a connection issue caused by MITM, it sets the preference security.enterprise_roots.enabled to True, and tries the connection again.

The setting is reset to False if the connection does fail, or kept set to True if it does not fail.

Firefox administrators may enable the feature by setting security.certerrors.mitm.auto_enable_enterprise_roots to true.