In addition, the “Search Bar” settings in Settings > Search, which let you choose between using the address bar for search and navigation or add the search bar in the toolbar, is also gone in Firefox 122.
This doesn't affect me, but I'm sure there's going to be a vocal tiny percent that absolutely hate this news.
A quick look at the documentation seems to indicate that they have not removed or officially deprecated the feature, only made it more complicated to configure it.