I switched to IE and Chrome for most of my browsing. I prefer Chrome from a usability standpoint, especially when closing multiple tabs, but it's made by Google, which basically means everything I do is being tracked and combined with marketing to better "target" my particular flavor of "never clicks on ads".
I don't like Firefox to be honest. Chief reason (before I spent enough time to figure it out) was its separation of the search and address bar and it's apparent inability to change the address bar's search engine. Now that I've figured that stuff out, I basically don't use it out of habit.