# EmailThis/extension-boilerplate

⚡️ A template for building cross browser extensions for Chrome, Opera & Firefox.

Repository: https://github.com/EmailThis/extension-boilerplate
Canonical: https://ross.abutalabs.com/products/extension-boilerplate
Homepage: https://www.emailthis.me/open-source/extension-boilerplate
Language: JavaScript
License: MIT
License Family: permissive
Topics: chrome-extension, firefox-addon, opera-extension, extensions, webextensions, boilerplate-template, gulp, es6
Last push: 2024-05-02T11:02:01+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3480, "days_push": 853, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3322, forks 363 (observed 2026-08-28T04:07:56.333123+00:00)

## What it is
A boilerplate template for building cross-browser extensions for Chrome, Opera, and Firefox using the WebExtensions API. It provides a Gulp-based workflow with ES6/Babel transpilation, SCSS support, live-reload, and environment/platform-specific configuration.

## Use cases
- start a new chrome extension project
- build a firefox addon from a template
- write one codebase for multiple browsers
- set up gulp build for a webextension
- get live reload while developing a browser extension
- scaffold a cross-browser extension with es6 and scss

## When to choose
- you want a quick starting point for a Chrome/Firefox/Opera extension
- you prefer a Gulp + Babel + Browserify workflow
- you need environment- and platform-specific config variables out of the box

## When to avoid
- you use modern tooling like Vite, webpack, or a framework (React/Vue) extension scaffolds
- you target Safari or Edge specifically
- you need actively maintained tooling with recent WebExtensions API coverage

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: build-tool, developer-tools, cli
- domain: browser-extensions, web-development, developer-tools, cross-platform
- platform: browser, browser-extension
- tags: webextensions, chrome-extension, firefox-addon, opera-extension, gulp, es6, babel, scss, template, live-reload, boilerplate, nodejs

## Member repositories
- EmailThis/extension-boilerplate (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:56.333123+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 2026-08-30T08:31:31.436025+00:00, confidence not recorded.
  - readme: https://github.com/EmailThis/extension-boilerplate (fetched 2026-08-28T04:07:56.333123+00:00, sha 2fb707c08c92)
  - registry_npm: https://registry.npmjs.org/extension-boilerplate (fetched 2026-08-29T09:35:44.444575+00:00, sha 5b731b6b891c)
- Data as of 2026-08-30T08:39:29.467469+00:00.