if i use a browser that only five people use, the risk of a security breach is rare even if there is a known hole. What are the chances that a website that has code in it to take advantage of my insecure browser is one that I will visit. Who would even want to take advantage of an exploit on a browser that five people use. Now if i use a browser that 5 million people use the risks are extremely higher since you have a better chance of gaining access via a hole. A pretty good percentage of those 5 million will most likely go to ebay or amazon.com

