I'm talking about auto completion in search (in address bar or search bar), which by default is Google. Not talking about Google website, or any text area in webpage in general.

>I'm quite happy that Firefox..

Don't get me wrong, I'm happy with that too. The one I replied to seems not happy about the behavior that you can get auto-completion results from search engines in Chrome, because that "end up sending keystrokes to third parties". I was simply pointing out Firefox did that too with default search engine, just not when you're using keyword to call other engines; which IMO implies it's purely a technical limitation, not a privacy choice.