LibreWolf

LibreWolf is a free and open-source fork of Firefox, with an emphasis on privacy and security. It is licensed under the MPL 2.0.

Development
LibreWolf was initially released for Linux operating systems on March 7, 2020. The goal of the LibreWolf project was to create a more privacy-focused version of Firefox. A community-maintained version for Windows was released a year later, with a macOS port released soon after. It can also be installed via a portable AppImage or via the Microsoft Store and Windows Package Manager.

Features
LibreWolf does not include telemetry and has uBlock Origin pre-installed. Certain features like Pocket are also disabled, and the auto-update function has been removed. LibreWolf does not have sponsored shortcuts, cloud sync, and deletes cookies and history when the browser is closed. LinuxSecurity noted that LibreWolf may not have full compatibility with some websites.

According to the website PrivacyTests.org, LibreWolf, along with Brave Browser and Tor Browser, had the most privacy protection compared to other browsers.