Mozilla wants to make searching for the things you need faster on Firefox, and so to facilitate that the company will be introducing an update sometime in the future that brings with it a new search interface. With this new search, users are able to type a keyword into the search field, then choose a specific preset search engine or website on which they want to view the result, among them being sites like Wikipedia and Google. This follows news that Yahoo will be the browser's new default search option.
It's 2022, every browser should have this.
Web browsers collect a massive amount of our web history data. These options can help with that.
A major source of revenue for Mozilla.
Can't work it out yet but I hope it will be something useful at least.