If you’re on a Mac, you have Safari installed as well which is better than Chrome (or most Chromium flavors) on the privacy and security front, not to mention battery life and performance.
However, I’m sure Mozilla would like a bug report, because I’ve never seen performance issues with Firefox on a Mac. Edit: I should note that the couple of MacBook Airs I had it installed on were pre-Retina so that might explain why I hadn’t seen this particular issue.
Safari occasionally crashes for me on OS X with a massive stacktrace. One time it was because it couldn't create a directory locally in my Preferences.
Never had that trouble with Chrome. Flawless browser.
However, I’m sure Mozilla would like a bug report, because I’ve never seen performance issues with Firefox on a Mac. Edit: I should note that the couple of MacBook Airs I had it installed on were pre-Retina so that might explain why I hadn’t seen this particular issue.