if u just want the answer to smoothest then OPERA is the clear winner.
but if u want functionality the Dolphin and Marine Browsers are just perfect speed and performance and options.

IMO it is Opera Mini, never had any problems till date.

Just completed another round of " What's the best browser for me "

4th - Boat browser
3rd - UC Browser
2nd - Opera mobile
1st - Dolphin Browser HD

I won't go into the politricks of them this is my view.

Dolphin Browser HD

maxthon browser

I've never been a fan of Firefox but it runs surprisingly well on CM7. I live out in BFE and every other browser I've tried takes a while to even load up a page. Firefox is extremely smooth and loads web pages almost instantly for me.

Sent from my MB860

Dolphin browser HD is fast but Firefox is way faster.

Maxthon browser mini it's better

Sent from my MB860 using xda premium

The new dolphin hd beta with dolphin engine is pretty damn fast, but I found it a little unstable. I'm using the standard dolphin after doing the rounds with pretty much everything else out there. I liked opera, it used to be necessary, but with dual core hardware and the acres of RAM the atrix has, I don't think there is any need for light browsers anymore.

I just have one big issue with dolphin in that they fill your add on bar with spam add ons. I have no desire for dolphins battery saver add on yet the only way to get it out of the way is to install it and disable it. I am not impressed, dolphin is seriously a good browser though, I always seem to come back to it.

Sent from my MB860 using Tapatalk 2

Firefox is great because you can sync tabs and history with your desktop. This is why I am a fan of Firefox.

Sent from my MB860 using xda app-developers app