Chrome. I use both that and Opera on the same computer - in theory, Chrome should store five tabs (Pokémon thingy, music playlist, two forums and my YouTube subscriptions) and Opera, two tabs (email and a tally counter for complicated reasons). This keeps things neat as long as I don't let things stack up, which I presently have... Chrome is just really fast and pretty, so I use that for most all activities. Opera is kind of slick, though, and I have an irrational dislike of Firefox, so it's my only real option other than really hipstery browsers.
Achamo on Mega Evolution.