there used to be a browser called 'broadpage' that allowed you to view two (or more) web pages at the same time within a single window, similar to tiling windows vertically on the desktop.
alas, 'broadpage' is no more.
but, oh joy, here comes 'tablane' http://www.tablane.com
for me, the most beneficial feature that tablane has, is the ability to open links from one pane directly to the adjacent pane, i.e. you could keep your search results in view whilst each result that you clicked upon would then open alongside in the next pane, or 'lane' as the authors of the program like to call them.
okay, you can achieve similar results by opening two browsers on your desktop and tiling them, then simply dragging links from one window to the other - but it wouldn't be as much fun as using 'tablane'.
it's early days for the browser, there are bugs and not many options but i think it shows promise. i'll not be using it as my main browser but i'll certainly be tempted to give it a try when i know i'm going to be browsing several sites at a time (which is a lot now that i think about it).
i've still not tried 'firefox' (shock, horror) so i wouldn't be too surprised if there is a plugin that behaves in a similar way to 'tablane'. if there is i'd like to hear of it please - the point being that a link, when clicked, will automatically
open up in the next 'pane' and not the 'pane' the link is in.
(if there is a plugin for 'maxthon' that performs this kind of function then i'd like to hear about that also - if firefox can do it then it may well be the thing that finally makes me a convert.)