Messaging in Web Extensions made easy. Batteries included.
Reduce headache and simplify the effort of keeping data in sync within your browser extension.
Supports all major browsers
Features
Simplify web extension development.
Keep your web extension in sync, no matter where your user's interaction occurs.
Works in every major browser
Expect a "batteries included" experience for Chrome, Firefox, Safari, and Edge.
Promise-based Messaging
Easily handle raised messages within your browser extension.
Type-safe Protocols
Ensure your messages are being received correctly and accurately.
Precise Message Targets
Send messages precisely to the background page, content script, pop-up, and extension page.
Fully Documented
We work hard to maintain community-centered documentation.
Open Source on GitHub
Everything you find with this project is free and open source on GitHub under the MIT License.
Professionally Supported
Maintained by web extension experts
The project is maintained by creators who use this project in their own products.
Authors of "Building Multi-Platform Extensions"
We compiled a book to help you develop your extension. We cover how to use this project in your own product so you can get up and running quickly.
Learn more →Professional Support
Feeling stuck and need quick answers? We're available to help via video and screensharing.
Learn more →Amazing & Active Community
Our community is a friendly and helpful space to get you up and running along with others using the project.
Learn more →
Frequently asked questions
Everything you need to know about getting started.
Who started this project?
This project was originally started by Neek Sandhu (@zikaari) in 2017. Unfortunately time became a constraint and in January 2024, the project was graciously transferred to Server Side Up to be maintained. We're very grateful for Neek Sandhu's contributions and we're excited to carry the torch forward. 🤝
