If you previously installed a customized version of Firefox with Yandex or Mail.ru, offered through partner distribution channels, this release removes those customizations, including add-ons and default bookmarks. Where applicable, your browser will revert back to default settings, as offered by Mozilla. All other releases of Firefox remain unaffected by the change.
Bugzilla: 1759009 - Update Distribution Config
lemmy.ml: Firefox v98.0.1 removed Yandex search option and used misleading bug name to hide it
Yeah, Brave’s CEO is Brendan Eich. That put me off right there. Mozilla aren’t perfect, but at least they kicked him to the curb.