: The hotkey used to toggle between firewall profiles was updated to cycle through all available profiles rather than just Low and Medium.

: Local unprivileged users could potentially bypass firewall restrictions by modifying rules within the user interface.

: The software replaced the Windows Communication Foundation (WCF) with gRPC for more robust inter-process communication.

WFC focuses on making the complex rules of Windows Defender Firewall accessible through a simplified interface:

: While Windows Firewall is excellent at blocking inbound threats, it lacks a simple way to manage outbound connections. WFC provides instant notifications when a program tries to connect to the internet, allowing you to allow or block it on the fly.

Released specifically as a maintenance and feature update in early 2023, version 6.9 introduced several efficiency and usability changes: