Dolphin browser beta in the play store has been updated for 4.2 it is free and easily beats out the aosp browser and the original dolphin browser. It uses html5. This browser is the fastest browser I have used scrolling is insane on the N4 give it a try! U won't be disappointed..
Dolphin browser was a great browser with super fast speeds. Comparing this to my phones normal search engine, it was about 2.5x's faster. Lately running bigger sites takes more processing power with greater speeds but no more! Puffin Browser is 6.3x's faster than Chrome, which is probably your current browser.