Waterfox

A privacy‑focused web browser that combines a secure foundation with extensive built‑in customization. It ships with features such as private tabs, zero telemetry, encrypted DNS, and a vertical tab interface that automatically organizes links into parent‑child hierarchies, allowing users to keep research trails and complex sessions readable without relying on extensions.

Designed for power users who want control over their browsing experience, the browser provides tools to collapse or hide entire subtrees of tabs, duplicate branches for idea‑forking, and adjust layout directly within the application. These capabilities aim to reduce the need for external add‑ons while maintaining a fast, private, and configurable environment.

The software is open source, stable, and primarily targeted at macOS users seeking a privacy‑first alternative that still offers the depth of customization typically found only in hidden flags or third‑party extensions.