Mozilla's WebExtensions documentation

developer.mozilla.orgsite

MDN wiki for the WebExtensions API.

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WebExtensions

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2026-10-10

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1. ▲
   mdn/webextension-examples github.com

   tool category #webextensions link ↗

   Various example extensions curated for the MDN documentation.

   
2. ▲
   Chrome Extensions documentation developer.chrome.com

   site category #webextensions link ↗

   Documentation for the original Chrome extension model.

3. ▲
   Browser support for WebExtensions developer.mozilla.org

   site category #webextensions link ↗

   Compatibility table for Chrome, Edge, Firefox, and Opera.

4. ▲
   WebAssembly MDN developer.mozilla.org

   site category #webassembly link ↗
5. ▲
   Browser Extension Standard browserext.github.io

   site category #webextensions link ↗

   Standard for the API, supported by Mozilla, Opera and Microsoft.

6. ▲
   Web Workers in MDN developer.mozilla.org

   site category #html5 link ↗

WebExtensions › Getting started: “MDN wiki for the WebExtensions API.”