# Alex313031/Mercury

Firefox fork with compiler optimizations and patches from Librewolf, Waterfox, and GNU IceCat.

Repository: https://github.com/Alex313031/Mercury
Canonical: https://ross.abutalabs.com/products/alex313031-mercury
Homepage: https://thorium.rocks/mercury
Language: JavaScript
License: MPL-2.0
License Family: copyleft
Topics: browser, firefox, mercury, optimization, privacy, avx, avx-instructions, compiler-optimization, firefox-fork, firefox-forking, sse3, web-browser, web-platform, webbrowser
Last push: 2026-08-09T10:55:59+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 96, release rhythm 8, longevity 100
- inputs: {"age_days": 1522, "days_push": 24, "days_rel": 715, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1539, forks 42 (observed 2026-08-28T04:05:00.436073+00:00)

## What it is
Mercury is a Firefox fork with compiler optimizations (AVX, AES, LTO, PGO) and privacy/security patches drawn from LibreWolf, Waterfox, Ghostery, and BetterFox. It is the Firefox counterpart to the author's Thorium Chromium fork, claiming 8-20% performance gains over vanilla Firefox.

## Use cases
- faster firefox build optimized for my cpu with avx
- privacy hardened firefox without mozilla telemetry
- firefox fork with librewolf and waterfox patches combined
- portable browser with preconfigured user profile
- alternative to thorium but for firefox users

## When to choose
- you want a compiler-optimized Firefox build for Linux or Windows
- you want privacy patches from multiple Firefox forks pre-applied
- you want a portable browser with a self-contained profile directory

## When to avoid
- you need macOS support
- you want official Mozilla support or auto-updates from Mozilla
- you prefer stock Firefox stability over patched builds

## Facets
- artifact type: application
- maturity: active
- function: security, privacy, developer-tools
- domain: privacy, web-development, cross-platform
- platform: windows
- tags: firefox-fork, web-browser, compiler-optimizations, avx, pgo, lto, privacy-hardening, linux, desktop

## Member repositories
- Alex313031/Mercury (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:00.436073+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 2026-08-30T04:30:52.243857+00:00, confidence not recorded.
  - readme: https://github.com/Alex313031/Mercury (fetched 2026-08-28T04:05:00.436073+00:00, sha 7d6f6a45e0dc)
  - homepage: https://thorium.rocks/mercury (fetched 2026-08-29T11:32:28.018166+00:00, sha e170fd1c2a79)
- Data as of 2026-08-30T08:39:29.467469+00:00.