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.
Features
LibreWolf does not include telemetry or auto-updating and certain features like Pocket are disabled. It does not have sponsored shortcuts.
By default, LibreWolf deletes the user's cookies and history when the browser is closed, but that feature can be disabled. LinuxSecurity noted that LibreWolf may not have full compatibility with some websites.
By default, Firefox Sync is disabled for Librewolf, though it is possible to enable it in the Librewolf settings.
According to the website PrivacyTests.org in 2022, LibreWolf, along with Brave Browser and Tor Browser, had the most privacy protection compared to other browsers.