Best browser is Explorer if you are competent and update your system with security patches often.
With Explorer you almost always get the best version of the homepage since it is the defacto standard for viewing homepages.
Had you done any web development recently you'd know that this is in fact untrue. Nowadays, most modern pages are XHTML with CSS for the actual layout. Internet Explorer does not follow the standards and all developers and tools have to work to work around the bugs and layout mistakes. IE6, the most used browser in the world, has quite an impressive list of long standing bugs that will never be fixed, since IE7 is out, and even IE7 does not render the Acid2 test correctly (at least it understands min-height and the PNG alpha channel). No, any decent web page nowadays is not designed for IE, it's correct CSS with IE workarounds. I build primary school websites (based on Microsoft technologies, mind you) and the building process we use is the following:
o Build for all browsers (KHTML, Gecko, Opera and any other decent browser).
o Add workarounds for Internet Explorer. The usual target is IE6 but with proper min-heights for IE7, since it understands that. Targeting IE7 directly is not currently an option, since IE6 does not display all pages correctly while IE7 renders all IE6 pages fine.
Explorer starts faster than Firefox.
I personally don't like Firefox and the startup time is quite an insignificant and silly thing to mention. Firefox and all Mozilla variants are just not snappy enough for my liking, I prefer KHTML browsers.
I am not enjoying the situation, just telling you how it is.