# Boot to Gecko (B2G/Firefox OS)

DEPRECATED - Boot to Gecko aims to create a complete, standalone operating system for the open web.

Repository: https://github.com/mozilla-b2g/B2G
Canonical: https://ross.abutalabs.com/products/boot-to-gecko-b2gfirefox-os
Homepage: https://wiki.mozilla.org/B2G
Language: Shell
License: NOASSERTION
License Family: other
Topics: abandoned, unmaintained
Archived: true
Last push: 2020-07-06T12:12:11+00:00
Link (homepage): https://wiki.mozilla.org/B2G
Link (site_page): https://wiki.mozilla.org/B2G/FAQ
Link (site_page): https://wiki.mozilla.org/B2G/FAQ/Apps
Link (site_page): https://wiki.mozilla.org/B2G/QA/Bugzilla/FAQ
Link (site_page): https://wiki.mozilla.org/Releases

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5234, "days_push": 2249, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1132, forks 770 (observed 2026-08-28T04:03:42.739139+00:00)

## What it is
Gaia is Mozilla's HTML5-based phone user interface for the Boot to Gecko (B2G) project, which aimed to build a complete standalone operating system for the open web (Firefox OS). The project is deprecated and unmaintained, with its last release in 2021.

## Use cases
- build a phone UI entirely in HTML5 and JavaScript
- study how Firefox OS implemented its user interface
- run a web-based mobile OS on a compatible device or desktop
- explore historical Mozilla mobile OS architecture
- contribute to or fork an open-source web-based phone stack

## When to choose
- you need to reference or maintain legacy Firefox OS code
- you are researching web-based operating system design
- you want to fork an HTML5 phone UI as a starting point

## When to avoid
- you need a maintained mobile OS or UI framework
- you are building a new product for modern devices
- you need security updates or active community support

## Facets
- artifact type: application
- maturity: abandoned
- function: ui-components, frontend-framework, testing
- domain: mobile-development, web-development, operating-systems
- platform: cross-platform
- tags: firefox-os, boot-to-gecko, html5-phone-ui, deprecated, mozilla, mobile-os, mobile, javascript

## Member repositories
- mozilla-b2g/B2G (main) score 10
- mozilla-b2g/gaia (frontend) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:42.739139+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 2026-08-30T02:54:21.424546+00:00, confidence not recorded.
  - readme: https://github.com/mozilla-b2g/B2G (fetched 2026-08-28T04:03:42.739139+00:00, sha f90d57c87d76)
  - homepage: https://wiki.mozilla.org/B2G (fetched 2026-08-29T10:34:52.738886+00:00, sha 00a72dc60973)
  - site_page: https://www.mozilla.org/en-US/about/governance/policies/participation (fetched 2026-08-29T10:34:52.751208+00:00, sha ec8057123d54)
  - site_page: https://wiki.mozilla.org/MozillaWiki:About (fetched 2026-08-29T10:34:52.753529+00:00, sha 0a09e7e891e7)
  - site_page: https://wiki.mozilla.org/B2G/FAQ (fetched 2026-08-29T10:34:52.741808+00:00, sha d7c8460b9e77)
  - site_page: https://wiki.mozilla.org/B2G/FAQ/Apps (fetched 2026-08-29T10:34:52.745917+00:00, sha ea3d3baf05e7)
  - site_page: https://wiki.mozilla.org/B2G/QA/Bugzilla/FAQ (fetched 2026-08-29T10:34:52.747891+00:00, sha ec4691d277d2)
  - site_page: https://wiki.mozilla.org/Releases (fetched 2026-08-29T10:34:52.749622+00:00, sha 8be31ebd7049)
- Data as of 2026-08-30T08:39:29.467469+00:00.