In the end, features do not win this browser war. Since Internet Explorer comes pre-installed on every other Windows-based PC, it will dominate the market. And that’s the end of it.

You guess why so many Mac people use Safari. It’s not the better browser. Firefox or Camino on Mac OS X do a much better job (strictly “imho”).
But Safari is the default browser available. And even though installing software is a breeze, people will use what is installed.

Only when a user is into this (working with the Web or IT) kind of thing or they are very frustrated, they will install another software.

Or (of course), if someone does it for them. I installed Firefox for my mother and she loves it. But would she have switched by herself? Rather not.