WebExtensions

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WebExtensions are an API developed by the WebExtensions Community Group for building browser add-ons.

API draft: https://github.com/w3c/webextensions/blob/main/index.bs

Browser Documentation

As there isn’t a single standard (yet), browsers publish their own documentation.

MDN publishes an overview:

• browser support of the separate APIs.

Browser documentation:

• Google Chrome: Extensions
• Microsoft Edge: Microsoft Edge extensions
• Mozilla Firefox: Browser Extensions
  • Find a Compatible Alternative to your Firefox Legacy Extension
• Opera: Extensions Documentation
• Safari: Safari Web Extensions

IndieWeb Examples

• Omnibear: a Micropub client in your browser that uses the WebExtensions API
• …

History

WebExtensions Community Group Formed

• New WebExtensions Community Group has been formed 2021-06-04

arewewebextensionsyet.com

• Until March of 2018: arewewebextensionsyet.com was a one page site documenting whether or not the WebExtensions API was supported in Firefox, see 2018-03-11 latest Internet Archive snapshot

See Also

• browser extension
• CG repo: https://github.com/w3c/webextensions/