Its much better, and indistinguishable from a usage standpoint against chrome (I use Google garbage at work and they deliberately hamstring it in Firefox, so I use both browsers side by side)

Biggest Firefox win is containers and privacy. Chrome probably has better absolute security (based purely on the concept that non-private security is Google's whole schtick, not based on data) and in the last year it's gotten better memory management (via sleeping tabs) that Firefox just hasn't caught up with...but there's an addon for that ;)