I tried Firefox 3 on Windows and I liked it there, but on the Mac? Bleah. It looks like a bad knockoff of Safari but without the attention to detail that signifies Apple products. A lot of the icons are ugly, and off by just a pixel here or there. You’d think one pixel wouldn’t make that much difference but it does. Plus I actually preferred the traditional Firefox 2 chrome to the Safari style brushed metal widgets.
Plus it’s perceptually much slower than Firefox 2. I’m a 20 WPM typist at best and I’m typing faster than Firefox can enter text into this form. The characters are several words behind where I’m typing about half the time.
Firefox 3 was supposed to only remember passwords after you’d successfully logged in, but on Mozilla’s own Add-Ons site, that’s not working. It asked me to remember a failed password.
Plus Firefox still hasn’t learned some basic principles of the human interface guidelines, like “If a menu item brings up a dialog instead of taking immediate action, its label ends in …” or that icons do not change the left alignment of menu item labels: