Interesting thought -- but IIRC, before Chrome, Firefox was already facing an uphill battle, since most people just tended to use the browser bundled with their OS. I mostly remember only tech savvy people tending to download Firefox back in those days.
Yeah, I used internet explorer until chrome. People said firefox was so much better than internet explorer, but they always felt comparable to me and I'm not a person who just switches because others tells me to. Chrome however really felt different, I switched to it when it was just a beta and had less site compatibility simply because I liked it so much more.