Experience a privacy-focused, open-source browser rich with features like vertical tabs, Split View, Zen Glance, and extensive security protocols. Built on Firefox, it's currently in beta, emphasizing privacy and adaptability, with future plans for horizontal tabs.
Open-source web browser built on Firefox, prioritizing privacy and anonymity while offering a Chromium-like interface, user customization, and robust tracking protection.
Waterfox is a free, open source web browser focused on privacy out of the box and customisation to your taste. It has built-in ad blocking, private and anonymised DNS, no telemetry and no data collection. Plus, a variety of quality of life features.
This project is a custom and independent version of 
Mozilla Firefox, with the primary goals of privacy, security and user freedom.
Fast, secure browser with built-in ad block, privacy controls, and global tracking protections. Optimizes data, speed, and battery life.
Cromite is a Chromium fork based on Bromite with built-in support for ad blocking and an eye for privacy.
Comments
Interesting list. Some other open source browsers of interest are Pale Moon and Mullvad Browser