My web browser of choice is Firefox. I actually use a portable version of Firefox that can be cloned and run off a USB flash drive. I've tried other browsers, like Chrome, Opera and even IE8, but after five minutes of browsing I find myself missing Firefox terribly.
Yes, there are several Firefox add-ons I use for work and play that I miss when I try Chrome or Opera, but there's one in particular I miss immensely. I can't surf the web without Adblock Plus.
Adblock Plus blocks ads on the Internet. I've been using it for years, and I'm always shocked when I see my favourite sites in other people's browsers. I just don't see banner ads or flash ads or even sponsored ads in Google. I don't even see the ads on meebo.com, my IM of choice, or all those ads you see in Yahoo! News.
If you use Firefox, you're likely already using Adblock Plus. If you're not using Firefox and Adblock Plus, don't you think it's time you gave it a shot?