# Thorium

Chromium fork named after radioactive element No. 90. Source code and Linux releases. Windows/MacOS/ARM builds served in different repos, links are towards the top of the README.md.

Repository: https://github.com/Alex313031/thorium
Canonical: https://ross.abutalabs.com/products/thorium
Homepage: https://thorium.rocks/
Language: C++
License: BSD-3-Clause
License Family: permissive
Topics: chromium, chromium-browser, chromedriver, webbrowser, web-browser, web-platform, content-shell, thorium, linux, chrome, chrome-devtools, avx, thorium-browser, thoriumos, aes, jpeg-xl, jpegxl, libjxl, jxl, avx-instructions
Last push: 2026-08-23T16:36:38+00:00
Link (homepage): https://thorium.rocks/
Link (site_page): https://thorium.rocks/about

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 1780, "days_push": 10, "days_rel": 10, "gap_med": 37.0, "n_releases_24m": 11}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7463, forks 283 (observed 2026-08-28T04:10:00.039523+00:00)

## What it is
Thorium is a Chromium fork for Linux (with Windows, macOS, Android, and Raspberry Pi builds in companion repos) that applies compiler optimizations like LTO, PGO, and SIMD-specific builds for faster performance. It aims to match Google Chrome's feature set while adding UI, privacy, and security patches.

## Use cases
- fast chromium-based web browser for linux
- browser optimized for my cpu with avx2 builds
- chrome alternative with privacy and security patches
- chromium fork with jpeg-xl support
- chromedriver for testing with thorium
- lightweight chrome-like browser without google telemetry

## When to choose
- you want a faster Chromium build tuned to your CPU's SIMD instructions
- you prefer Chrome's featureset but with extra privacy/usability patches
- you need a Chromium fork maintained for Linux, Windows, macOS, Android, or Raspberry Pi

## When to avoid
- you need official Google support or Widevine/proprietary codecs guaranteed
- you require strict security auditing of a mainstream browser rather than a fork
- you want a non-Chromium engine like Firefox or WebKit

## Facets
- artifact type: application
- maturity: active
- function: web-framework
- domain: web-development, privacy, developer-tools
- platform: windows, cross-platform
- tags: chromium-fork, web-browser, compiler-optimizations, pgo, avx, jpeg-xl, chromedriver, linux, macos, android

## Member repositories
- Alex313031/thorium (main) score 95
- Alex313031/Thorium-Win (mirror) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:00.039523+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 2026-08-29T17:37:38.255112+00:00, confidence not recorded.
  - readme: https://github.com/Alex313031/thorium (fetched 2026-08-28T04:10:00.039523+00:00, sha 5badd08b0bb3)
  - homepage: https://thorium.rocks/ (fetched 2026-08-29T08:32:57.315268+00:00, sha df0ff766079c)
  - site_page: https://thorium.rocks/about (fetched 2026-08-29T08:32:57.324286+00:00, sha 1dbdaf3788e0)
- Data as of 2026-08-30T08:39:29.467469+00:00.