Pale Moon is an open-source web browser that is based on the Mozilla Firefox codebase. It is designed to be lightweight and customizable, offering users a familiar interface while focusing on speed and efficiency. Pale Moon supports various extensions and themes, allowing users to tailor their browsing experience to their preferences. The browser prioritizes user privacy and security, providing features like a built-in ad blocker and options for enhanced tracking protection. Pale Moon is available for multiple operating systems, including Windows and Linux, making it accessible to a wide range of users who seek an alternative to mainstream browsers.