That's interesting, it doesn't auto-expand for me. When I make a new tab, the URL bar is active, but it doesn't expand the dropdown thingy. If I start typing, or click on the URL bar, then it shows the dropdown. Maybe it's a platform difference (I'm on Linux), or some configuration tweak (I use the "compact" layout option), or buggy for one of us :)
On Linux with FF 75 for me, clicking in the URL bar (or Ctrl+L) sets focus to the bar (as it used to), but also causes the bar to expand downwards (open) with suggestions.
FF 74 didn't use to do this, neither does Chrome for me.
The dropdown list of suggestions/search results is not the expanding thing that people are complaining about. The URL box itself expands. Maybe you wouldn't have been so dismissive of people's complaints if you had fully understood what this change does.
You've called people rude for feeling strongly about their objections to this change, you've denied that Mozilla would have shipped a negative change, you've accused the detractors of this change of not understanding that it could pose a maintenance burden to keep it optional, and you've asserted that said maintenance burden outweighs the usability benefit of letting existing users keep the existing behavior.
You've done everything except provide an actual argument in favor of why Mozilla should introduce this new UI behavior that breaks existing conventions and interferes with other features in ways that are as-yet unresolved.
And you're doing similar stuff elsewhere in the thread about other questionable Mozilla UI decisions.
