Why is Mozilla trying so hard to make Firefox exactly like Chrome? I have been using Firefox since like 1.5, if I wanted it to be like Chrome I would use Chrome.
I tried using Firefox again a while ago and I went right back to Chrome. Overall, Firefox feels more sluggish than Chrome. In part, whenever pages are loading in Firefox, it seems to make the whole browser feel sluggish -- something which doesn't happen in Chrome.
And believe me I have LOTS of tabs (sometimes > 50) open. Firefox handles them much more nicely than Chrome, uses less memory and doesn't crash, EVER.
Chrome is just too happy to show me the sad face randomly during page loads.
Different users and configs have different experiences and the memory or speed issues are something from the past even if the features were comparable (You can't beat the amount and quality of FF's addons).
A concerning issue about FF is that it might be drifting away from one of the things that makes it great. The ability to customize.
Disclaimer: Chrome, Firefox, Opera are all great browsers and people should use whatever they like but if you start pushing a case for your subjective choice, be prepared to deal with arguments.
I've compared Firefox with Chrome on different systems, and my perception of the performance was the same in all cases. Chrome is a memory hog, but it does not lag as Firefox does when it's loading pages.