Zen Browser

Xavier Jimenez | May 24, 2025 min read

What is Zen Browser

Zen Browser is a free and open-source web browser based on Mozilla Firefox, introduced in July 2024. It emphasizes privacy, customization, and a minimalist design, aiming to provide a more mindful and distraction-free browsing experience.


๐Ÿง˜ What Makes Zen Browser Unique?

Privacy-First Approach: Zen Browser blocks trackers and ads by default, collects no user data, and allows users to disable Mozilla’s telemetry.

Vertical Tabs & Workspaces: It features vertical tabs and allows users to organize tabs into separate workspaces, enhancing productivity and organization.

Split View & Glance Mode: Users can view multiple tabs side-by-side using Split View, and preview links in a modal window with Glance Mode, facilitating efficient multitasking.

Zen Mods: The browser supports extensive customization through Zen Mods, a collection of user-generated themes and add-ons.

Cross-Platform Compatibility: Zen Browser is available for Windows, macOS, and Linux, supporting both x86_64 and ARM64 architectures.


๐Ÿ” Security Features

Based on Latest Firefox: Zen Browser incorporates the latest security updates and patches from Firefox.

Strict SSL Standards: It treats insecure SSL connections as broken by default and blocks connections to websites that do not meet modern security standards.

OCSP Support: Zen Browser uses the Online Certificate Status Protocol to verify the validity of websites’ SSL certificates, enhancing protection against expired or revoked certificates.


๐Ÿงช Development & Community

Zen Browser is actively developed by a community of contributors and is hosted on GitHub. It offers a “Twilight” build for users interested in testing the latest experimental features.