# PlasmoHQ/plasmo

🧩 The Browser Extension Framework

Repository: https://github.com/PlasmoHQ/plasmo
Canonical: https://ross.abutalabs.com/products/plasmo
Homepage: https://www.plasmo.com
Language: TypeScript
License: MIT
License Family: permissive
Topics: browser-extension, chrome-extension, parcel, reactjs, sdk, typescript, bundler, edge-addon, firefox-addon
Last push: 2026-08-26T19:49:04+00:00

## Health v2 (maintenance only)
Score: 79/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 40, longevity 100
- inputs: {"age_days": 1584, "days_push": 7, "days_rel": 473, "gap_med": 30, "n_releases_24m": 6}
- flags: no_readme
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13140, forks 463 (observed 2026-08-28T04:11:02.299297+00:00)

## What it is
Plasmo is an open-source framework and SDK for building browser extensions with React and TypeScript. It handles bundling, manifest generation, hot reloading, and publishing workflows for Chrome, Firefox, and Edge extensions.

## Use cases
- build a chrome extension with react and typescript
- develop browser extensions without writing boilerplate manifest code
- hot reload a browser extension during development
- publish an extension to chrome web store and firefox addons
- migrate a manifest v2 extension to manifest v3
- create content scripts and popup UIs for extensions

## When to choose
- you are starting a new browser extension project from scratch
- you want an integrated build, test, and publish pipeline for extensions
- you want React/TypeScript support with live reloading in extension development

## When to avoid
- you have a simple extension that does not need a full framework
- you need fine-grained control over the bundler or manifest generation
- your extension targets browsers or platforms outside the mainstream Chromium/Firefox ecosystem

## Facets
- artifact type: framework
- maturity: active
- function: build-tool, sdk, developer-tools, browser-extension
- domain: browser-extensions, web-development, developer-tools
- platform: browser-extension, cross-platform
- tags: chrome-extension, firefox-addon, manifest-v3, react, bundler, extension-development, typescript, nodejs

## Member repositories
- PlasmoHQ/plasmo (main) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:02.299297+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 2026-08-29T17:13:29.951035+00:00, confidence not recorded.
  - homepage: https://www.plasmo.com (fetched 2026-08-29T08:09:16.444931+00:00, sha b761878a72cc)
  - site_page: https://www.plasmo.com/docs (fetched 2026-08-29T08:09:16.454027+00:00, sha 246b3afbb39b)
- Data as of 2026-08-30T08:39:29.467469+00:00.