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
Mozilla has been under control by Google; so I am unsurprised that they are acting like this.
I don’t think supporting firefox of Firefox will help much though.