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Extension.js

Create, develop, build, and preview browser extensions for Chrome, Firefox, and Edge.
README.md

The cross-browser extension framework

Browsers

Extension.js provides a single workflow to create, develop, build, and preview cross-browser extensions. Build browser extensions for Chromium, Chrome, Edge, and Firefox.

  • Get started: Create a new extension with npx extension@latest create my-extension.
  • Read the docs: Learn the workflow, APIs, and core concepts.
  • Browse examples: Start from examples for common extension patterns.

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  1. extension.js.org extension.js.org Public

    Documentation, guides, and API reference for Extension.js.

    TypeScript 8 13

  2. extension.js extension.js Public

    The cross-browser extension framework.

    TypeScript 4.9k 127

  3. .github .github Public

    Organization profile, community health files, and shared defaults for Extension.js.

    1

  4. examples examples Public

    Browser extension examples and templates for common patterns.

    JavaScript 4

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  • extension.js Public

    The cross-browser extension framework.

    extension-js/extension.js’s past year of commit activity
    TypeScript 4,923 MIT 127 10 0 Updated Mar 17, 2026
  • examples Public

    Browser extension examples and templates for common patterns.

    extension-js/examples’s past year of commit activity
    JavaScript 4 MIT 0 0 0 Updated Mar 17, 2026
  • extension.js.org Public

    Documentation, guides, and API reference for Extension.js.

    extension-js/extension.js.org’s past year of commit activity
    TypeScript 8 MIT 13 1 0 Updated Mar 17, 2026
  • .github Public

    Organization profile, community health files, and shared defaults for Extension.js.

    extension-js/.github’s past year of commit activity
    0 1 0 0 Updated Mar 17, 2026

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