Earlier quoted context omitted.
No, we're not getting it back. I filed a bug, thinking this was an inadvertant side-effect of the new address bar, but it was closed WONTFIX. The old user setting was never really supposed to be used on Windows, just as a workaround for something I don't remember, and the use case is invalid. I still wish I'd get that distinction between single click and double click back.
Yeah, I was aware of that bug report (thanks for filing it). The rationale given is ridiculous, though - anywhere else on my system if I click on a text field, the cursor gets placed where I click and nothing gets selected. It's hard for me to imagine what use case the current behavior is optimized for.
I think the current behavior is optimized for people who use the mouse for everything and don’t feel confident enough to edit the URL of the site they’re on. Such people aren’t comfortable with learning new keyboard shortcuts like Ctrl-L or Alt-D, so they will notice an increase in speed because they only have to click once to select the URL. I imagine before they were either triple-clicking or clicking once and hitting Ctrl-A. Then those users type the name of the next site they want to visit, completely replacing the current URL, and press Enter to visit it.