Not sure it’s the right patch though. (Does a search engine need an extension to support being used for omnibox search? It might.) In any case, the two ultimate sources of the linked report seem to be:
Grigory Bakunov[1] (ex-Yandex) observes Yandex has been removed (but e.g. OZON is still there): https://t.me/addmeto/4782 (ru, but basically amounts to a screenshot)
Mozilla posts a vague note saying the “default search engine” (NB: omnibox default, not just installation default) may change in Firefox 98, no specific engines are named: https://support.mozilla.org/en-US/kb/search-engine-removal (en)
> Does a search engine need an extension to support being used for omnibox search? It might.
No, IIRC it just needs to have an appropriate OpenSearch xml file to have support for omnibox. I use a third-party engine that isn't bundled in FF and it works fine in omnibox.
Grigory Bakunov[1] (ex-Yandex) observes Yandex has been removed (but e.g. OZON is still there): https://t.me/addmeto/4782 (ru, but basically amounts to a screenshot)
Mozilla posts a vague note saying the “default search engine” (NB: omnibox default, not just installation default) may change in Firefox 98, no specific engines are named: https://support.mozilla.org/en-US/kb/search-engine-removal (en)
[1] https://www.wikidata.org/wiki/Q4076123