# Zen Browser

Welcome to a calmer internet

Repository: https://github.com/zen-browser/desktop
Canonical: https://ross.abutalabs.com/products/zen-browser
Homepage: https://zen-browser.app
Language: C++
License: MPL-2.0
License Family: copyleft
Topics: firefox, firefox-based, firefox-browser, zen-browser
Last push: 2026-08-26T23:37:40+00:00
Link (homepage): https://zen-browser.app
Link (site_page): https://zen-browser.app/release-notes
Link (site_page): https://zen-browser.app/about
Link (site_page): https://docs.zen-browser.app
Link (site_page): https://docs.zen-browser.app/

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 86, longevity 63
- inputs: {"age_days": 889, "days_push": 7, "days_rel": 14, "gap_med": 3, "n_releases_24m": 152}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 44104, forks 1729 (observed 2026-08-28T04:12:09.253586+00:00)

## What it is
Zen Browser is a free, open-source, Firefox-based desktop web browser focused on privacy and productivity. It adds features like Workspaces, Compact Mode, Glance, and Split View on top of the Firefox engine, with live CSS customization and a mods registry.

## Use cases
- browse the web with a privacy-focused Firefox fork
- organize tabs into workspaces for separate projects
- view two tabs side by side with split view
- customize the browser UI with live CSS editing
- maximize screen space with a compact auto-hiding tab bar
- sync tabs and spaces across devices via a Mozilla account

## When to choose
- you want Firefox compatibility with a more modern, productivity-oriented UI
- you care about privacy and open-source licensing (MPL-2.0)
- you need workspaces, split view, or heavy UI customization
- you use Windows, macOS, or Linux desktop

## When to avoid
- you need mobile browser support
- you require enterprise support or long-term stability guarantees
- you depend on Firefox features Zen may lag behind on during updates

## Facets
- artifact type: application
- maturity: active
- function: security, privacy
- domain: privacy, developer-tools, web-development, cross-platform
- platform: windows, cross-platform
- tags: firefox-based, browser, tab-management, workspaces, split-view, customization, open-source, linux, macos, desktop

## Member repositories
- zen-browser/desktop (main) score 87
- zen-browser/www (frontend) score 68

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:09.253586+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:22:15.586979+00:00, confidence not recorded.
  - readme: https://github.com/zen-browser/desktop (fetched 2026-08-28T04:12:09.253586+00:00, sha a0f1da24dcbe)
  - homepage: https://zen-browser.app (fetched 2026-08-29T07:46:11.459114+00:00, sha c3719ca7f98c)
  - site_page: https://zen-browser.app/about (fetched 2026-08-29T07:46:11.475298+00:00, sha 356115b5076d)
  - site_page: https://docs.zen-browser.app (fetched 2026-08-29T07:46:11.478242+00:00, sha 5ebc0091808e)
  - site_page: https://docs.zen-browser.app/ (fetched 2026-08-29T07:46:11.481965+00:00, sha 5ebc0091808e)
  - site_page: https://zen-browser.app/release-notes (fetched 2026-08-29T07:46:11.469370+00:00, sha afd6f60adcd2)
- Data as of 2026-08-30T08:39:29.467469+00:00.