> "a browser's chrome has to be the least important thing I can think of."
This is a similar statement to :
1. "whether a phone has buttons or a touchscreen is the least important thing I can think of. As long as it makes calls."
2. "whether a car has a steering wheel or a joystick is the least important thing I can think of. As long as it runs on roads."
You have a lot to learn about UX, Sir. It is a real thing.
Also, people wanted the minimalism of chrome. Australis was minimalistic. It was also ugly. This is clearly indicated by the fact that the most downloaded theme for Firefox is FXChrome (which essentially reskins Firefox to look like Chrome.).
The fact is Firefox has lagged behind for long , its not even worth discussing it. And this time, it is plainly Mozilla's incompetence. No more "oh..IE comes prebundled ..its so unfair *cry* " type arguments to make. Chrome is simply technically better than Firefox. As for privacy concerns, this has been discussed enough times to everyone ought to know that you can turn off all the data collection activities in Chrome. Those who don't turn them off , don't care. Those who care, already do.