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Zen Browser is a privacy-first open source browser built on Firefox with workspaces, split view, and a compact interface designed to reduce distraction. A focused alternative to Arc; MPL-2.0 licensed.
It is a free, open-source video conferencing solution for web and mobile, offering secure, flexible, and feature-rich communication capabilities.
An open-source visual editor for React, empowering developers to build visual editing experiences into their React applications.
A free, open-source web browser focused on privacy, performance, and customization, backed by Mozilla's non-profit mission.
LibreWolf is a hardened Firefox fork with telemetry removed, strict tracking protection, and uBlock Origin pre-installed. A privacy-focused alternative to Firefox with no manual configuration required. MPL-2.0 licensed.
Windmill is an open source developer platform for running scripts, building internal tools, and orchestrating workflows in Python, TypeScript, Go, and SQL. AGPL licensed; self-host or use Windmill Cloud.
Zen Browser is an open source browser built on Firefox that adds workspaces, split view, and a focused compact UI to reduce browser distraction, offering a privacy-first alternative to Arc for users who prefer Mozilla's engine over Chromium.
Arc Browser popularized the idea of a workspace-organized, distraction-reducing browser interface, but it runs on Chromium with no self-host path and no Linux support. Users who want Arc's UX without Chromium's privacy defaults, or who need cross-platform Linux support, have no direct equivalent.
Zen Browser is built directly on Firefox, inheriting its anti-fingerprinting protections, extension ecosystem, and open source foundation. It adds Arc-style workspaces for organizing tabs by context, split view for working across multiple pages simultaneously, and a glance mode for previewing links without fully navigating. MPL-2.0 license applies, consistent with Firefox's own licensing.
Download the installer for macOS, Linux, or Windows from the Zen Browser website or the GitHub releases page. Installation is identical to any standard browser; no account or configuration is required.
MPL-2.0 (Mozilla Public License 2.0), consistent with Firefox's own licensing. Free to use, modify, and distribute; modified files must be made available under MPL-2.0.
Zen Browser is best for developers, researchers, and knowledge workers who want a workspace-organized browser experience like Arc but built on Firefox's privacy defaults and available on Linux.
Unlike Arc, which is closed source and built on Chromium, Zen Browser is MPL-2.0 licensed and built on Firefox. Arc has more polished UX and iOS support; Zen is cross-platform including Linux and inherits Firefox's stronger default privacy protections.
