Firefox 3.0.5, because I it has adblock and has the easiest system to switch between the 6 spellcheck dictionaries I use. Chrome won't even install, and IE8 has, amongst other bugs expected of a beta release and the lack of addons, buggy japanese text input.
The only thing I like about IE8 that I miss in firefox is the different tabs showing up as separately on the taskbar popup.
I used to use Privoxy/Chrome on Vista with my Laptop, or Firefox 3 with Adblock Plus on Linux with my laptop. However, in Windows 7, Internet Explorer 8 is looking nice. A few times I was mildly worried there were some privacy issues (I don't like the idea of my browser sending out my history) but it seems to be okay.
IE8 is still a mess for web compatibility, but hopefully they'll keep going with the standards compliance. At least they did something.
Opera. Fastest browser around especially for images. I'm not a FF fan but that being said I hear that it's better than IE. One of the features that I like about Opera is the "Paste and Go" option when pasting a URL. Gee why didn' FF think of that? And all those extensions are not really necessary. Give me speed and ease of use. I am surprised that Opera is not more widely accepted.
D\L the .zip and extract it. Place the extracted folder anywhere you want and create a shortcut to the .exe.
Running this shortcut will open Pale Moon with all your Firefox extensions, plugins, bookmarks and other customizations.