Waterfox is a Firefox fork that emphasizes browsing speed, ethical software development, and user privacy while continuing to support the XUL extensions that Firefox dropped in version 57. To protect user privacy, Waterfox maintains a policy of not collecting any data that could be problematic - dropping features like Pocket integration, Telemetry, Sponsored Tiles, and startup profiling. The default search engine for Waterfox is Ecosia rather than Google or Yahoo. Because the Waterfox creators view digital rights management as a user-hostile anti-feature, it does not support Adobe DRM or the W3C's Encrypted Media Extension. Waterfox is free software, licensed under the Mozilla Public License, with source code available on GitHub. Waterfox executables can be downloaded for Windows, macOS, and 64-bit Linux. A mobile version is also available for Android devices.