> Firefox Suggest sends Mozilla search terms and information about engagement with Firefox Suggest, some of which may be shared with partners to provide and improve the suggested content.

https://blog.mozilla.org/data/2021/09/15/data-and-firefox-su...

> To deliver smarter contextual suggestions, Firefox will need to send Mozilla new data, specifically, what you type into the search bar, city-level location data to know what’s nearby and relevant, as well as whether you click on a suggestion and which suggestion you click on.

https://blog.mozilla.org/en/products/firefox/firefox-news/fi...