I happen to completely agree with Jeff Atwood.
I find my self tending towards using IE7 fro preciclythat reason: A native UI. While the ability to re-skin Firefox with any one of hundreds, if not thousands, 0f skins is attractive on paper, I find Firefox a bit “strange” after an extended IE7 session.
They are both the same, with near enough the same abilities and the UI differences show up for that reason. I agree with Jeff:
When two applications with rough feature parity compete, the application with the native UI will win. Every time. If you truly want to win the hearts and minds of your users, you go to the metal and take full advantage of the native UI.
But when it comes to day-to-day browsing, I’ll always pick native speed and native look and feel over the ability to install a dozen user extensions, or the ability to run on umpteen different platforms. Every single time.
Time to get The Mozilla Foundation to adopt the .Net Framework.
Random Musings 