You may be right, but it's very unclear. I came to my conclusion because Firefox calls every result a "Firefox Suggest" result (see the title at the top of the

You may be right, but it's very unclear. I came to my conclusion because Firefox calls every result a "Firefox Suggest" result (see the title at the top of the results). From https://blog.mozilla.org/data/2021/09/15/data-and-firefox-suggest/ https://blog.mozilla.org/data/2021/09/15/data-and-firefox-su..., it looks like Firefox (currently) matches your search terms against a local list before forwarding them. So not everything is sent, but anything including a term specified by the advertising agency. It's unclear if it includes the entire search query or just the single word. That same blog post seems to indicate that mozilla "may" send the entire query. It also appears that Mozilla is sending city level location data. Of course, that same blog post implies that the feature is opt-in (which it definitely isn't).