Mozilla Firefox is a free and open-source web browser developed by the Mozilla Foundation. Known for its speed, privacy features, and user-friendly interface, Firefox allows users to browse the internet securely and efficiently. It supports a wide range of extensions and themes, enabling customization to enhance the browsing experience. With a strong emphasis on user privacy, Firefox includes features like enhanced tracking protection and a built-in password manager. It is available on multiple platforms, including Windows, macOS, and Linux, making it a versatile choice for users around the world.