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Home/Categories/Web Development/Zen Browser
icon of Zen Browser

Zen Browser

Open source alternative to SigmaOS and Brave Browser

Optimize focused browsing with a privacy-first Firefox fork that adds workspaces, split view, and compact tabs.

42.8K starsJavaScriptMPL-2.0Active recently
Visit websiteGitHub repo
image of Zen Browser
Contents
  1. 01Who Zen Browser is for
  2. 02The problem it solves
  3. 03How it solves it
  4. 04Strengths and trade-offs
  5. 05Zen Browser vs alternatives
  6. 06Tech stack
  7. 07FAQ
  8. 08Similar open-source tools
TL;DR

Zen Browser is a Firefox-based open source browser for users who want a calmer productivity-focused alternative to Chrome or Arc. It keeps the browser choice outside the Chromium default while experimenting with a more focused desktop browsing experience.MPL-2.0 · JavaScript · 42.8K stars · Active recently

who it's for

Who Zen Browser is for#

Power users leaving Chrome defaults

Use Zen when you want a Firefox-based browser with a productivity-oriented interface instead of another Chromium browser.

Skip if:

Your company requires Chrome policies, Google account integration, or enterprise browser management.

Open source users trying Arc-like focus

Use Zen when Arc’s interface appeals to you but proprietary browser lock-in does not.

Skip if:

You need the most mature mainstream browser compatibility possible.

the problem

The problem it solves#

Browsers are where work, research, and communication converge, but the default choices often push users toward one vendor ecosystem or a busy interface. People who want a quieter browser without leaving open source roots need an option that still tracks modern Firefox compatibility.

how Zen Browser solves it

How it solves it#

Firefox-based foundation

Zen builds on Firefox, giving users a browser path outside Chromium while keeping compatibility with much of the modern web.

Productivity-focused interface

The project positions itself around calmer, more productive browsing rather than another generic browser shell.

Open source desktop project

The code, release activity, and localization work are visible, which helps users evaluate the browser beyond a closed installer.

strengths · trade-offs

Strengths and trade-offs#

Strengths

  • Alternative to Chromium monocultureZen gives users a modern browser choice that is not built on the same Chromium base as Chrome, Edge, Brave, and Arc.
  • Focused browser experienceThe project’s calmer-internet positioning is useful for users who want fewer distractions in daily browsing.

Trade-offs

  • -Younger browser projectZen does not yet have the enterprise track record, extension assumptions, or support surface of Chrome or Firefox itself.
  • -Arc remains more polished for mainstream productivity browsingArc’s proprietary product has more market polish and onboarding for users who do not care about open source.
versus alternatives

Zen Browser vs alternatives#

Zen Browser vs Chrome and Arc

Zen Browser is better when users want a Firefox-based browser with a calmer productivity-focused interface outside the Chromium default. Chrome is stronger for enterprise compatibility and Google account integration, while Arc is more polished for users who want a proprietary productivity browser. Zen fits people who want browser choice without leaving open source roots.

tech stack · detected from GitHub

What it's built on#

Languages
C++JavaScriptPython
frequently asked

FAQ#

Is Zen Browser based on Firefox?

Yes. The README describes Zen as a Firefox-based browser.

Can Zen Browser replace Chrome?

Zen can replace Chrome for users who want a Firefox-based open source browser and do not depend on Chrome-specific enterprise features.

How is Zen Browser different from Arc?

Zen targets a calmer productivity browser experience with open source roots. Arc is proprietary and more mature for mainstream onboarding.

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Repository

Stars
42.8K
Forks
1.6K
License
MPL-2.0
Latest
1.21b
Last commit
36 days ago
Last verified
Jun 11, 2026
Repo
zen-browser/desktop ↗

Additional details

Language
JavaScript
Open issues
510
Contributors
224
First release
2024

Categories

Web DevelopmentBusiness & ProductivityDeveloper Tools

Tags

Web BrowsersPrivacy ToolsDeveloper ToolsOpen CoreSecurity