# mumuy/browser

浏览器检测 - Useragent分析/浏览器识别/浏览器判断/用户代理信息/浏览器指纹/Useragent analysis tool/Browser detection

Repository: https://github.com/mumuy/browser
Canonical: https://ross.abutalabs.com/products/mumuy-browser
Homepage: https://passer-by.com/browser/
Language: JavaScript
License: MIT
License Family: permissive
Topics: useragent, browser, detection
Last push: 2026-06-12T15:27:11+00:00

## Health v2 (maintenance only)
Score: 71/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 87, release rhythm 35, longevity 100
- inputs: {"age_days": 3389, "days_push": 82, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1879, forks 362 (observed 2026-08-28T04:05:48.452250+00:00)

## What it is
A JavaScript library for user-agent analysis and browser detection that identifies browser, engine, OS, device, GPU, network, and other client details. It also supports feature detection and generates a composite browser fingerprint.

## Use cases
- parse user-agent strings to detect browser and version
- detect device type and OS for responsive content adaptation
- check whether the client is a bot or webview
- collect browser fingerprint data for analytics
- detect support for fonts, WebGL, or NFC features
- log client environment details for debugging

## When to choose
- you need lightweight browser/device detection in frontend or Node.js
- you want fingerprinting and feature detection beyond simple UA parsing
- you need broad browser coverage with ongoing data updates

## When to avoid
- you need server-side log-scale UA parsing at very high throughput
- you rely on user-agent strings for security decisions (spoofable)
- you need a full commercial-grade device intelligence database

## Facets
- artifact type: library
- maturity: active
- function: browser-extension, developer-tools, analytics
- domain: web-development, frontend, browser-extensions, analytics
- platform: browser
- tags: useragent-parsing, browser-detection, browser-fingerprinting, device-detection, feature-detection, nodejs, javascript

## Member repositories
- mumuy/browser (main) score 71

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:48.452250+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 2026-08-30T03:14:37.858156+00:00, confidence not recorded.
  - readme: https://github.com/mumuy/browser (fetched 2026-08-28T04:05:48.452250+00:00, sha aa0b8db73bb7)
  - homepage: https://passer-by.com/browser/ (fetched 2026-08-29T10:53:32.724350+00:00, sha 4bd6777e4584)
  - site_page: https://passer-by.com/about.html (fetched 2026-08-29T10:53:32.733354+00:00, sha 53b4769d67d3)
- Data as of 2026-08-30T08:39:29.467469+00:00.