I find them to be close enough to imperceptible for just normal html and css etc.
The stumbling block for me as FireFox user is I am increasingly bumping into web apps that preform poorly in FF but are fine in Chrome for one reason or another. One instance I bump into a lot is ElasticSearches Kibana runs like trash in FF for some reason.
I am guessing performance differences might be masked by good hardware? Sometimes performance differences don't show up until you use an underpowered machine.
I don't think it's just that. I have a half-dead Chromebook with linux, and I use Firefox on it. Some years back I ran Chrome on it because it worked better, but at some point I started seeing issues with Chrome and tried Firefox again. I've been using Firefox since.
The stumbling block for me as FireFox user is I am increasingly bumping into web apps that preform poorly in FF but are fine in Chrome for one reason or another. One instance I bump into a lot is ElasticSearches Kibana runs like trash in FF for some reason.