For the last eleven years, Firefox Search Engine add-ons have been powered byOpenSearch. With the recent implementation of thesearch overrides API, a WebExtensions API that offers users more controls for opting into changes, Mozilla intends to deprecate OpenSearch and eventually remove it from Firefox. Search Engine add-ons will be removed from AMO on December 5, 2019.
For Search Engine add-ons to continue working, they must be converted to an extension using the WebExtensions API by December 3, 2019.For more information, please see the following documents on MDN web docs:
- Create an extension for Firefox using the WebExtensions API
- Code examples for the search overrides API
Unfortunately, it is not possible to automatically migrate users of Search Engine add-ons to their replacement extensions. If you are the developer of a Search Engine add-on, we recommend linking to your new extension’s listing page from your search add-on’s listing page so your users know where to install the update.
If you have any questions, please ask them in ourcommunity forum.
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