I found something called Browser2RAM. You have to have root access, though. Supposedly, it speeds up the stock browser. I cannot personally confirm because I'm not rooted. I just found this by accident, Googling Jelly Bean Browser. Kinda curious if it works and how it compares to Dolphin.
I like Dolphin, along with Dolphin Jetpack, as well. I like Chrome on my macbook pro, but I have no time for it on my phone. Dolphin gives me a Home button, speed dials, and in 2 clicks I can turn it off. To me, much more user friendly.