# firefox-devtools/profiler

Firefox Profiler — Web app for Firefox performance analysis

Repository: https://github.com/firefox-devtools/profiler
Canonical: https://ross.abutalabs.com/products/profiler
Homepage: https://profiler.firefox.com
Language: TypeScript
License: MPL-2.0
License Family: copyleft
Topics: firefox, javascript, react, redux, performance, profiler, gecko-profiler, devtools
Last push: 2026-08-26T08:19:30+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 97, longevity 100
- inputs: {"age_days": 5297, "days_push": 7, "days_rel": 23, "gap_med": 0.0, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1529, forks 490 (observed 2026-08-28T04:04:58.720928+00:00)

## What it is
Firefox Profiler is a web application for visualizing performance profiles recorded from Firefox and other browsers via the Gecko Profiler. It runs entirely client-side and can consume JSON output from any compatible profiler.

## Use cases
- analyze firefox performance profiles
- visualize gecko profiler recordings
- profile web app performance bottlenecks
- share browser performance profiles with a url
- inspect jank and slow frame causes in firefox
- import  profiles from other profilers

## When to choose
- you need to analyze Firefox or Gecko profiler captures
- you want a free, client-side profile viewer with no data upload requirements
- you need to share performance profiles via links with teammates

## When to avoid
- you need profiling for non-browser applications like native or server software
- you require automated performance regression testing in CI
- you need a CLI-only workflow without a web interface

## Facets
- artifact type: application
- maturity: active
- function: data-visualization, analytics, developer-tools
- domain: developer-tools, performance, web-development, browser-extensions
- platform: browser, cross-platform
- tags: profiler, performance-analysis, gecko-profiler, react, redux, typescript, client-side, firefox-devtools, web-server

## Member repositories
- firefox-devtools/profiler (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:58.720928+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 2026-08-30T04:31:27.935536+00:00, confidence not recorded.
  - readme: https://github.com/firefox-devtools/profiler (fetched 2026-08-28T04:04:58.720928+00:00, sha 85463616d0dd)
  - homepage: https://profiler.firefox.com (fetched 2026-08-29T11:34:03.037383+00:00, sha 0ecac0a80b87)
- Data as of 2026-08-30T08:39:29.467469+00:00.