# firefox-devtools/debugger

The faster and smarter Debugger for Firefox DevTools 🔥🦊🛠

Repository: https://github.com/firefox-devtools/debugger
Canonical: https://ross.abutalabs.com/products/debugger
Homepage: https://firefox-dev.tools/
License Family: other
Topics: redux, debugger, javascript, react, node, firefox, chrome, devtools, mozilla, flowtype
Archived: true
Last push: 2023-01-11T19:07:25+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3815, "days_push": 1330, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4608, forks 749 (observed 2026-08-28T04:08:54.953442+00:00)

## What it is
The Firefox Debugger, a JavaScript debugger for Firefox DevTools originally developed on GitHub and now maintained in Mozilla's central repository. It provides source-level debugging with framework support for JavaScript running in Firefox.

## Use cases
- debug javascript in firefox
- step through js code with breakpoints
- debug react apps in the browser
- inspect and debug web app source in devtools
- debug javascript from vs code in firefox

## When to choose
- you need a powerful JavaScript debugger integrated into Firefox DevTools
- you want framework-aware debugging for modern JS apps
- you contribute to Mozilla DevTools

## When to avoid
- you need a debugger for Chrome or another browser
- you want a standalone debugger outside Firefox
- you expect active development on this GitHub repo, since it moved to Mozilla central

## Facets
- artifact type: application
- maturity: maintenance
- function: developer-tools, editor
- domain: developer-tools, web-development, frontend
- platform: browser
- tags: debugger, devtools, firefox, javascript-debugging, mozilla, react, redux, web-server, nodejs

## Member repositories
- firefox-devtools/debugger (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:54.953442+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 2026-08-29T18:19:44.191072+00:00, confidence not recorded.
  - readme: https://github.com/firefox-devtools/debugger (fetched 2026-08-28T04:08:54.953442+00:00, sha 682c3e743d1c)
  - homepage: https://firefox-dev.tools/ (fetched 2026-08-29T09:05:01.412141+00:00, sha 3c980c851cfb)
- Data as of 2026-08-30T08:39:29.467469+00:00.