This is usually one of the biggest game which web developer had to deal with. Which browser should I support? How about IE?
Apart from that, this is also an issue for internet suffers (at least for users who are aware of speed and security of the browser). What is the right browser for them? Should they use Internet Explorer because it is built into those Windows system? Or should they replace them with Firefox because of those stickers and peer pressure from their friends, plus the ability to be expanded with plugins? Or should they use webkit-based browser for speed and fast rendering, but less expandable, yet which browser? Safari? Chrome? Or the unsung hero of poor connectivity internet browsing experience, the Opera?