Firefox add-on technology is modernizing

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  • Revision id: 139971
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  • Creator: andrewtruong
  • Comment: place info into a note to catch use attention. Commented out sections not ready to placed out live to the user.
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: feer56
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: Yes
  • Readied for localization:
  • Readied for localization by: feer56
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Add-ons are programs that add extra features to Firefox. Anyone can create an add-on and make it available to Firefox users who want to personalize their online experience.

In the past, add-ons often stopped working each time a new version of Firefox was released, because developers had to update them every six weeks to keep them compatible. To address this (and other issues), we overhauled the underlying technology for building add-ons.

Outside of rare instances, add-ons created with the new standard won’t break in new Firefox releases.

Note: Starting in Firefox 57, which will be released in November 2017, only add-ons built with this new technology will work in Firefox. These are indicated by the “Compatible with Firefox 57+” label on addons.mozilla.org (AMO).

We recommend that you install add-ons with the “Compatible with Firefox 57+” label to ensure compatibility with Firefox beyond November 2017.

If you are the developer of a legacy add-on, resources are available to help you migrate to the new standard.