How's it been with Firefox? Without a stable Chrome, I need to move away from Safari as well.
I think Safari is the best of the browsers, but it could be better. Part of the problem is that many websites aren't Safari friendly although more and more are becoming so as more and more businesses and universities migrate to Mac. I do use Firefox when I need to go to a site that is not set up for Safari: but, I don't like to do so. I've heard both good and bad things about Chrome, but haven't had any reason to use it.
One good thing about Firefox used to be that it was set up for Private Browsing. Now that Yosemite lets you set up Private Browsing as a choice for your Home Page so that you can always open on PB if you so wish, Firefox's advantage is gone.
But, my preference for Safari may just be a personal reaction. Do what is most comfortable and best for you. That is usually the bottom line.