Website Ars Technica has compiled visitor browser use statistics updated for March. Internet Explorer continues to be the most popular browser with roughly 50% of users. The next two most popular are Firefox and Chrome. The two graphics here show over usage including mobile, and desktop only. Note that Safari use doubles as you move from desktop to overall visitors — this reflects iPhone and iPad.
Tracking visitor browser usage is important as each browser and platform has its own particular considerations. Mobile browsers have tiny screens, iPads and touch based, desktops have large screens. All of these must be considered in website design.