The average person definitely doesn’t have a good understanding of computational resources, but they will use an application they find smoother and less clunky than another. Realistically the performance and resource usage of chrome is not going to be bad enough to drive most people to Firefox these days, and Firefox won’t be enough of an improvement for most people to notice. Chrome also had a huge marketing campaign when it launched… I suspect that was crucial for getting people to adopt chrome (otherwise how do you even get people to think about switching?), but I don’t think Mozilla has the resources for such a campaign. Time will tell, though. I hope we’ll see more people switching to Firefox in the future.