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build Chrome and Firefox extensions with file-based entrypoints and an HMR development workflow

OSS scale score 253.5OSS health 92Update pace 5 commits/30d
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OSS scale score is an unbounded metric that log-compresses and weights Stars, Watchers, Forks, and Contributors. Discovery score is the current OSS scale score minus the score at discovery. Update pace is commits in the last 30 days, growth momentum is the OSS scale score difference within the recent observation window, and OSS health is a 0–100 rating based on available recency, Community Health, and release data.

Stars
10,555
Primary language
TypeScript
License
MIT
Repository last updated
Sep 29, 2026
On this page

Overview

WXT is a framework for Web Extension development. It supports Manifest V2 and V3, multiple browsers, TypeScript, file-based entrypoints, HMR, and automatic manifest generation while remaining frontend-framework agnostic for React, Vue, Svelte, and other UI stacks.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Key features

Generate manifests and bundles from project entrypoints

Background scripts, content scripts, popups, and other surfaces are organized as entrypoints, while wxt.config.ts and entrypoint metadata contribute to generated manifests and browser-targeted bundles under .output.

Sources: [2][3][4]

Target MV2, MV3, and multiple browsers from one project

The README lists multi-browser and Manifest V2/V3 support, with parts of the manifest converted according to the selected target. Development mode includes HMR and fast reload.

Sources: [2][4]

Best fit

Fits TypeScript-oriented teams building browser extensions across multiple targets

It is useful for extension projects that split popup, content-script, and background responsibilities while sharing one codebase across Chrome, Firefox, and optional React, Vue, or Svelte interfaces.

Sources: [2][3]

Before adoption

WXT v0.21.4 requires Node.js 22 or newer

The v0.21.4 package metadata requires Node.js 22+, or Bun 1.2.0+ when Bun is used. Align local and CI runtimes before adopting it in an existing project.

Sources: [5]

Browser-specific permissions still require explicit handling

WXT can help translate manifest shapes between MV2 and MV3, but browser permission support differs. The official guide recommends returning only the permissions required by each target browser.

Sources: [4]

Official sources

  1. [1]wxt-dev/wxt repository(2026-09-30)
  2. [2]WXT README(2026-09-30)
  3. [3]WXT installation guide(2026-09-30)
  4. [4]WXT manifest configuration guide(2026-09-30)
  5. [5]WXT v0.21.4 package metadata(2026-09-30)
  6. [6]WXT v0.21.4 release(2026-09-30)
  7. [7]WXT MIT license(2026-09-30)
Supplemental curator note

WXT is particularly useful when a team needs to keep browser-extension entrypoints and manifest differences manageable across multiple targets. Permission compatibility still needs target-specific review rather than relying entirely on automatic conversion.

Try it in 3 steps

  1. 1

    Bootstrap a WXT project

    Run the official init command and choose a template and package manager from the prompts.

    npx wxt@latest init
  2. 2

    Start development mode

    Move into the generated project directory and run the dev script to open a browser with the extension installed.

    npm run dev
  3. 3

    Create a production build

    Generate the target-browser manifest and bundle under .output, then inspect permissions and entrypoints before packaging.

    npm run build
Check the official README

Growth

Growth trends · Last 30 days

10,555 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
5
Open PRs
57

Development activity is still being collected.

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GitHub data

GitHub dataView detailed GitHub data
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GitHub Topics

  • build-tool
  • dev-server
  • hmr
  • wxt
  • chrome-extensions
Stars
10,555
Forks
569
Watchers
25
Open issues
166
Contributors
282
Owner type
Organization
Primary language
TypeScript
License
MIT
Repository last updated
Sep 29, 2026
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