Welcome to WebExtensions Experiments

WebExtensions are a cross-browser system for developing browser add-ons.

WebExtensions Experiments allow developers to write experimental WebExtensions APIs for Firefox. They can be used to prototype APIs for landing in Firefox, or for use on Nightly or Developer Edition.

Information about policies for WebExtensions APIs and how to request a new API are available on the Mozilla wiki.


This documentation lives on github, pull requests and issues are welcome.

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