# betterbrowser/arcfox

Make your production flow.

Repository: https://github.com/betterbrowser/arcfox
Canonical: https://ross.abutalabs.com/products/arcfox
Language: JavaScript
License: MIT
License Family: permissive
Topics: arc-browser, browser, firefox, firefox-addon, firefox-browser, firefox-css, firefox-customization, firefox-extensions, firefox-theme, firefox-tweaks, addon, sidebar, tabs, webextension, firefox-webextension, betterbrowser
Last push: 2025-06-01T21:38:03+00:00

## Health v2 (maintenance only)
Score: 43/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 24, release rhythm 40, longevity 91
- inputs: {"age_days": 1286, "days_push": 458, "days_rel": 720, "gap_med": 7, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1245, forks 39 (observed 2026-08-28T04:04:07.082301+00:00)

## What it is
ArcFox is a Firefox extension plus userChrome.css theme pack that brings Arc Browser's UI style, including a vertical sidebar and tab management, to Firefox. It is a community-driven customization project by the non-profit BetterBrowser collective.

## Use cases
- make firefox look like arc browser
- get a vertical tab sidebar in firefox
- customize firefox ui with userchrome css
- install an arc-style theme on firefox
- improve firefox tab management on windows
- apply arc browser aesthetics to firefox

## When to choose
- you want Arc Browser's UI on Firefox without switching browsers
- you are comfortable editing about:config and profile folders
- you want a free, community-driven Firefox customization

## When to avoid
- you need a polished, actively maintained product with frequent updates
- you dislike manual profile and userChrome.css setup
- you need guaranteed compatibility with future Firefox versions

## Facets
- artifact type: plugin
- maturity: experimental
- function: ui-components, theme, browser-extension
- domain: browser-extensions, web-development, developer-tools
- platform: browser, cross-platform
- tags: firefox-addon, userchrome-css, arc-browser-inspired, browser-customization, sidebar-tabs, firefox-tweaks

## Member repositories
- betterbrowser/arcfox (main) score 43

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:07.082301+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 2026-08-30T05:08:08.267518+00:00, confidence not recorded.
  - readme: https://github.com/betterbrowser/arcfox (fetched 2026-08-28T04:04:07.082301+00:00, sha e9850fcb14ec)
- Data as of 2026-08-30T08:39:29.467469+00:00.