Mozilla Firefox is a free, open-source web browser built for individuals and organizations that care about privacy, performance, and control over their web experience. It is developed by the Mozilla Foundation and Mozilla Corporation and is available across desktop and mobile platforms. Day to day, Firefox helps users browse quickly with a modern rendering engine, intelligent search, and efficient memory usage, while built-in Enhanced Tracking Protection blocks many trackers and malicious scripts by default. Users can sync bookmarks, history, passwords, open tabs, and preferences across devices, and customize the interface with themes, toolbars, and thousands of extensions.