Mozilla is in my opinion getting close to yielding web utopia to surfers. It is a dream (especially with gestures installed), and frankly makes IE look like a poor amateur.
However, it's missing some of the features from Opera that I used to quite like....
Namely the ability to apply "No Style" to the page (although it has an inbuilt style-switcher), and the ability to toggle images. I found these features very useful in development.
Are there any feature you'd like to see in your dream browser that Moz doesn't currently have?