# Firefox for Android

:warning: This repository hosts the Firefox for Android (Fenix), Focus for Android, and Mozilla Android Components projects. It is now developed and maintained as part of Mozilla Central. See the announcement here: https://github.com/mozilla-mobile/firefox-android/wiki#upcoming-migration-to-mozilla-central. ”

Repository: https://github.com/mozilla-mobile/firefox-android
Canonical: https://ross.abutalabs.com/products/firefox-for-android
Homepage: https://github.com/mozilla-mobile/firefox-android/wiki#upcoming-migration-to-mozilla-central
Language: Kotlin
License: MPL-2.0
License Family: copyleft
Archived: true
Last push: 2024-06-17T05:22:36+00:00
Link (homepage): https://github.com/mozilla-mobile/firefox-android/wiki#upcoming-migration-to-mozilla-central

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 1497, "days_push": 807, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1842, forks 358 (observed 2026-08-28T04:05:43.166175+00:00)

## What it is
Fenix is the open-source Firefox for Android browser, built on GeckoView and Mozilla Android Components in Kotlin. The project has migrated into mozilla-central (Firefox monorepo), with the GitHub repositories archived as read-only.

## Use cases
- browse the web privately on Android with tracking protection
- find an open-source alternative to Chrome on Android
- customize a mobile browser with extensions and themes
- contribute to a major open-source Android browser codebase
- build a custom Android browser on GeckoView
- sync browsing data with Firefox desktop

## When to choose
- you want a privacy-respecting, open-source browser on Android
- you want to contribute to or fork a full-featured mobile browser
- you need Firefox sync and tracking protection on Android

## When to avoid
- you need the latest source code - development moved to mozilla-central
- you need an iOS browser - this is Android-only
- you want a Chromium-based browser

## Facets
- artifact type: application
- maturity: maintenance
- function: browser-extension, gui, developer-tools
- domain: web-development, privacy, android-tools, cross-platform
- platform: jvm
- tags: web-browser, geckoview, mozilla, fenix, open-source-browser, mobile-browser, android, mobile

## Member repositories
- mozilla-mobile/firefox-android (main) score 10
- mozilla-mobile/fenix (mirror) score 10
- mozilla-mobile/focus-android (mirror) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:43.166175+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 2026-08-29T17:45:03.882698+00:00, confidence not recorded.
  - readme: https://github.com/mozilla-mobile/firefox-android (fetched 2026-08-28T04:05:43.166175+00:00, sha c0d8e97cf36f)
  - homepage: https://github.com/mozilla-mobile/firefox-android/wiki#upcoming-migration-to-mozilla-central (fetched 2026-08-29T08:41:58.172308+00:00, sha a893ff381f79)
- Data as of 2026-08-30T08:39:29.467469+00:00.