Even now, for me Chrome cold boots far faster than Firefox does - after doing a taskkill /f /im chrome.exe, chrome opens anywhere from 0.4 to 1.2 seconds after hitting "ok" on a run dialog with "chrome" entered in it, but the same thing with "firefox" in it takes from 3 to 8 seconds to open.

And that's not even a fair test either, as chrome has about 20 or so extensions installed and firefox has none.

Don't even get me started on the android variants of the two either, firefox just feels sluggish and unresponsive next to chrome.