A random sample of computer users were asked which browser they primarily relied on for surfing the Internet and whether this browser was installed on a desktop or laptop computer. The following contingency table shows these results. Browser Desktop Laptop Internet Explorer 18 33 Firefox 12 24 Chrome 15 30 Safari 3 9 Other 3 3 Given that the randomly selected computer was a desktop, the probability that the computer used the Firefox browser is ________. A) 40% chance B) 24% chance C) 52% chance D) 34% chance